# 2018 United States House of Representatives elections in Pennsylvania

Elections in Pennsylvania :
Federal government
U.S. President
1789
1792
1796
1800
1804
1808
1812
1816
1820
1824
1828
1832
1836
1840
1844
1848
1852
1856
1860
1864
1868
1872
1876
1880
1884
1888
1892
1896
1900
1904
1908
1912
1916
1920
1924
1928
1932
1936
1940
1944
1948
1952
1956
1960
1964
1968
1972
1976
1980
1984
1988
1992
1996
2000
2004
2008
2012
2016
2020
2024
Presidential primaries
Democratic
2000
2004
2008
2016
2020
2024
Republican
2008
2016
2020
2024
U.S. Senate
1788
1791
1793 sp
1794 sp
1795
1796
1797
1801
1801 sp
1802
1806
1808
1808 sp
1809 sp
1812
1814
1814 sp
1818
1820
1824
1826
1830
1831 sp
1832
1834 sp
1836
1840 sp
1843
1845
1845 sp
1849
1851
1856
1857
1861
1861 sp
1863
1867
1869
1873
1875
1877 sp
1879
1881
1885
1887
1891
1893
1897
1899
1901 sp
1903
1905
1905 sp
1908
1909
1909 sp
1911
1914
1916
1920
1922
1922 sp
1926
1928
1930 sp
1932
1934
1938
1940
1944
1946
1950
1952
1956
1958
1962
1964
1968
1970
1974
1976
1980
1982
1986
1988
1991 sp
1992
1994
1998
2000
2004
2006
2010
2012
2016
2018
2022
2024
2028
U.S. House of Representatives
1788
1791
1792
1794
1796
5th sp
1797
5th sp
1798
1st sp
4th sp
1800
8th sp
1801
4th sp
8th sp
12th sp
1802
1804
10th sp
1805
4th sp
11th sp
1806
1st sp
1808
1st sp
1809
1st sp
1810
1812
1813
3rd sp
5th sp
7th sp
13th sp
15th sp
1814
2nd sp
3rd sp
1815
1st sp
3rd sp
9th sp
1816
9th sp
1817
10th sp
1818
4th sp
6th sp
1820
5th sp
7th sp
1821
5th sp
10th sp
1822
1st sp
6th sp
7th sp
14th sp
1824
8th sp
13th sp
1825
16th sp
1826
2nd sp
7th sp
13th sp
18th sp
1827
2nd sp
1828
1829
8th sp
16th sp
1830
1831
11th sp
1832
1833
1st sp
1834
1836
13th sp
24th sp
1837
3rd sp
1838
9th sp
1839
14th sp
1840
13th sp
22nd sp
1841
2nd sp
13th sp
20th sp
18th sp
Jun
Dec
1842
17th sp
21st sp
1843
1844
12th sp
13th sp
21st sp
1846
1848
6th sp
1850
11th sp
15th sp
1852
1854
8th sp
1856
1857
12th sp
1858
8th sp
1860
8th sp
1861
2nd sp
12th sp
1862
7th sp
1864
1866
1867
12th sp
1868
9th sp
20th sp
1870
1872
13th sp
1874
23rd sp
1876
12th sp
1878
1880
1882
1884
19th sp
1885
19th sp
1886
1888
1890
3rd sp
4th sp
1892
1893
2nd sp
8th sp
1894
at-large sp
1895
15th sp
1896
1897
25th sp
1898
23rd sp
1899
9th sp
1900
5th sp
1901
10th sp
1902
17th sp
1903
4th sp
1904
3rd sp
1906
2nd sp
3rd sp
12th sp
1907
2nd sp
1908
1910
1911
2nd sp
14th sp
1912
1st sp
1914
1916
1917
28th sp
1918
1919
22nd sp
1920
3rd sp
1921
at-large sp
1922
1924
1926
1927
1st sp
1928
8th sp
1929
12th sp
1930
1931
2nd sp
1932
6th sp
18th sp
20th sp
1933
9th sp
1934
1936
1937
18th sp
1938
1939
4th sp
1940
1941
15th sp
1942
11th sp
12th sp
33rd sp
1943
2nd sp
23rd sp
1944
2nd sp
17th sp
1946
10th sp
23rd sp
33rd sp
1947
8th sp
1948
1949
22nd sp
26th sp
1950
1951
8th sp
14th sp
33rd sp
1952
1954
1956
2nd sp
30th sp
1957
13th sp
1958
4th sp
21st sp
1960
17th sp
18th sp
1961
16th sp
1962
1963
15th sp
23rd sp
1964
5th sp
1966
1968
1970
9th sp
1971
18th sp
1972
27th sp
1974
12th sp
1976
1st sp
1978
1980
11th sp
12th sp
1981
3rd sp
1982
1984
1986
1988
1990
1991
2nd sp
1992
1994
1996
1998
1st sp
2000
2001
9th sp
2002
2004
2006
2008
2010
12th sp
2012
2014
2016
2nd sp
2018
7th sp
15th sp
18th sp
2019
12th sp
2020
2022
2024 :
State government
Governor
1790
1793
1796
1799
1802
1805
1808
1811
1814
1817
1820
1823
1826
1829
1832
1835
1838
1841
1844
1847
1848
1851
1854
1857
1860
1863
1866
1869
1872
1875
1878
1882
1886
1890
1894
1898
1902
1906
1910
1914
1918
1922
1926
1930
1934
1938
1942
1946
1950
1954
1958
1962
1966
1970
1974
1978
1982
1986
1990
1994
1998
2002
2006
2010
2014
2018
2022
2026
Lieutenant Governor
1874
1878
1882
1886
1890
1894
1898
1902
1906
1910
1914
1918
1922
1926
1930
1934
1938
1942
1946
1950
1954
1958
1962
1966
1970
1974
1978
1982
1986
1990
1994
1998
2002
2006
2010
2014
2018
2022
Attorney General
1980
1984
1988
1992
1996
2000
2004
2008
2012
2016
2020
2024
Auditor General
2000
2004
2008
2012
2016
2020
2024
State Treasurer
2000
2004
2008
2012
2016
2020
2024
State Senate
2000
2002
2004
2006
2008
2010
2012
2014
2016
2018
2020
2022
2024
State House of Representatives
2000
2002
2004
2006
2008
2010
2012
2014
2016
2018
2020
2022
2024 :
Elections by year
State elections
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025 :
Philadelphia
Mayoral elections
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1856
1858
1860
1862
1865
1868
1871
1874
1877
1881
1884
1887
1891
1895
1899
1903
1907
1911
1915
1919
1923
1927
1931
1935
1939
1943
1947
1951
1955
1959
1963
1967
1971
1975
1979
1983
1987
1991
1995
1999
2003
2007
2011
2015
2019
2023
City Council elections
1951
1954 sp.
1955
1959
1963
2015
2019
2022–23 sp.
2023
Other municipal elections
1951
1953
1955
1957
1959
1961
1963
2023 :
Pittsburgh
Mayors
1909
1913
1917
1921
1925
1929
1933
1937
1941
1945
1949
1953
1957
1959
1961
1965
1969
1973
1977
1981
1985
1989
1993
1997
2001
2005
2007
2009
2013
2017
2021
2025 :
Allentown
Mayors
1977
1981
1985
1989
1993
1997
2001
2005
2009
2013
2017
2019 sp
2021
2025 :
Lancaster
Mayors
2009
2017
2021
2025 :
Harrisburg
Mayors
1969
1973
1977
1981
1985
1989
1993
1997
2001
2005
2009
2013
2017
2021
2025 :
Government :
vte :
The 2018 United States House of Representatives elections in Pennsylvania were held on November 6, 2018, to elect the 18 U.S. representatives from the Commonwealth of Pennsylvania, one from each of the state's 18 congressional districts.
The elections coincided with the 2018 gubernatorial election, as well as other elections to the House of Representatives, elections to the United States Senate and various state and local elections.
In January 2018, the Pennsylvania Supreme Court struck down the state's congressional map, ruling it had been unfairly gerrymandered to favor Republicans. New maps were subsequently adopted in February 2018.
The 2018 general election saw the Democrats gain four seats and the Republicans gain one seat, for a Democratic net gain of three seats, changing the state's representation from 12 to 6 Republican to a 9–9 tie. In addition, Pennsylvanians in several districts elected female candidates to the U.S. House, thus ending four years of all-male Congressional representation in the state.

## Redistricting

In January 2018, the Pennsylvania Supreme Court struck down the state's congressional map, ruling it had been unfairly gerrymandered to favor Republicans. New maps were subsequently adopted in February 2018, for use in the 2018 elections and took effect with representation in 2019.

## Overview
### Statewide

| Party | Party | Candidates | Votes | Votes | Seats | Seats | Seats |
| Party | Party | Candidates | No. | % | No. | +/– | % |
| | Democratic | 18 | 2,712,665 | 54.92% | 9 | 3 | 50.00% |
| | Republican | 17 | 2,206,260 | 44.67% | 9 | 3 | 50.00% |
| | Libertarian | 2 | 10,950 | 0.22% | 0 | | 0.00% |
| | Write-in | 1 | 9,452 | 0.19% | 0 | | 0.00% |
| Total | Total | 38 | 4,939,327 | 100.0% | 18 | | 100.00% |
Popular vote
Democratic
54.97%
Republican
44.81%
Libertarian
0.22%
Write-in
0.19% :
House seats
Democratic
50.00%
Republican
50.00%
Libertarian
0.00% :

### District

Results of the 2018 United States House of Representatives elections in Pennsylvania:
| District | Democratic | Democratic | Republican | Republican | Others | Others | Total | Total | Result |
| District | Votes | % | Votes | % | Votes | % | Votes | % | Result |
| District 1 | 160,745 | 48.74% | 169,053 | 51.26% | 0 | 0.00% | 329,798 | 100.0% | Republican hold |
| District 2 | 159,600 | 79.02% | 42,382 | 20.98% | 0 | 0.00% | 201,982 | 100.0% | Democratic hold |
| District 3 | 287,610 | 93.38% | 20,387 | 6.62% | 0 | 0.00% | 307,997 | 100.0% | Democratic hold |
| District 4 | 211,524 | 63.52% | 121,467 | 36.48% | 0 | 0.00% | 332,991 | 100.0% | Democratic hold |
| District 5 | 198,639 | 65.19% | 106,075 | 34.81% | 0 | 0.00% | 304,714 | 100.0% | Democratic gain |
| District 6 | 177,704 | 58.88% | 124,124 | 41.12% | 0 | 0.00% | 301,828 | 100.0% | Democratic gain |
| District 7 | 140,813 | 53.49% | 114,437 | 43.47% | 8,011 | 3.04% | 263,261 | 100.0% | Democratic gain |
| District 8 | 135,603 | 54.64% | 112,563 | 45.36% | 0 | 0.00% | 248,166 | 100.0% | Democratic hold |
| District 9 | 100,204 | 40.25% | 148,723 | 59.75% | 0 | 0.00% | 248,927 | 100.0% | Republican hold |
| District 10 | 141,668 | 48.68% | 149,365 | 51.32% | 0 | 0.00% | 291,033 | 100.0% | Republican hold |
| District 11 | 113,876 | 41.02% | 163,708 | 58.98% | 0 | 0.00% | 277,584 | 100.0% | Republican hold |
| District 12 | 82,825 | 33.96% | 161,047 | 66.04% | 0 | 0.00% | 243,872 | 100.0% | Republican hold |
| District 13 | 74,733 | 29.51% | 178,533 | 70.49% | 0 | 0.00% | 253,266 | 100.0% | Republican hold |
| District 14 | 110,051 | 42.09% | 151,386 | 57.91% | 0 | 0.00% | 261,437 | 100.0% | Republican gain |
| District 15 | 78,327 | 32.16% | 165,245 | 67.84% | 0 | 0.00% | 243,572 | 100.0% | Republican hold |
| District 16 | 124,109 | 47.30% | 135,348 | 51.58% | 2,939 | 1.12% | 262,396 | 100.0% | Republican hold |
| District 17 | 183,162 | 56.26% | 142,417 | 43.74% | 0 | 0.00% | 325,579 | 100.00% | Democratic gain |
| District 18 | 231,472 | 96.08% | 0 | 0.00% | 9,452 | 3.92% | 240,924 | 100.0% | Democratic hold |
| Total | 2,712,665 | 54.92%% | 2,206,260 | 44.67% | 20,402 | 0.41% | 4,939,327 | 100.0% | |

## District 1

The 1st district previously consisted of central and South Philadelphia, the City of Chester, the Philadelphia International Airport and other small sections of Delaware County. Under the new congressional map that was in place in 2019 (represented per 2018's elections), the first district overlaps with much of the former 8th district, which was represented by Republican Representative Brian Fitzpatrick. Fitzpatrick took office in 2017, succeeding his brother, former Representative Mike Fitzpatrick. The new 1st district consists of Bucks County and a small portion of Montgomery County.

### Republican primary
#### Candidates
##### Nominee

* Brian Fitzpatrick, incumbent U.S. Representative

##### Eliminated in primary

* Dean Malik, former Bucks County Assistant District Attorney and candidate for this seat in 2010 & 2016

##### Withdrawn

* Valerie Mihalek, former Yardley Borough council member and deputy district director for former U.S. Rep. Mike Fitzpatrick

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Brian Fitzpatrick (incumbent) | 31,374 | 67.00 |
| | Republican | Dean Malik | 15,451 | 33.00 |
| Total votes | Total votes | Total votes | 46,825 | 100.00 |

### Democratic primary

The old 8th district was included on the initial list of Republican held seats being targeted by the Democratic Congressional Campaign Committee.

#### Candidates
##### Nominee

* Scott Wallace, charitable foundation director and grandson of former Vice President Henry Wallace

##### Eliminated in primary

* Steven Bacher, environmentalist
* Rachel Reddick, former Navy prosecutor

##### Declined

* Diane Ellis-Marseglia, Bucks County commissioner

#### Campaign

The race featured a number of negative ads between Reddick and Wallace. With Reddick's campaign releasing an ad calling Wallace a “Maryland multi-millionaire” and stating that he had case an absentee ballot cast from his second home in a South African “gated luxury estate”. The Wallace campaign responded with an ad higlishting Reddick flubbing a question about the so-called “global gag rule” during a campaign stop in Ottsville, and for her having been registered as a Republican for most of her adult life.
Many DC Democrats expressed excitement about Wallace's potential to spend big to defeat Fitzpatrick, especially in the expensive Philadelphia market. He loaned his campaign $2.5 million while Reddick only raised $363,000 and was shunned by most party strategists.

#### Endorsements

U.S. Representatives
* Lois Frankel, U.S. Representative from Florida's 21st congressional district
* Seth Moulton, U.S. Representative from Massachusetts's 6th congressional district
Statewide officials
* Ed Rendell, former governor of Pennsylvania
Organizations
* EMILY's List
* Moms Demand Action
* Montgomery County Democratic Committee
* VoteVets
* With Honor Fund
Organizations
* Bucks County Democratic Committee
* Congressional Progressive Caucus
* Friends of the Earth Action
* People for the American Way
Local officials
* Diane Ellis-Marseglia, Bucks County commissioner

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Scott Wallace | 27,652 | 56.49 |
| | Democratic | Rachel Reddick | 17,288 | 35.32 |
| | Democratic | Steven Bacher | 4,006 | 8.18 |
| Total votes | Total votes | Total votes | 48,946 | 100.00 |

### General election
#### Endorsements

U.S. Representative
* Lou Barletta, U.S. Representative from Pennsylvania's 11th congressional district
Statewide officials
* Mark Schweiker, former governor of Pennsylvania
Labor unions
* AFL-CIO
* American Federation of Government Employees
* American Federation of State, County and Municipal Employees
* Communications Workers of America
* International Brotherhood of Boilermakers
* International Brotherhood of Teamsters
* International Organization of Masters, Mates & Pilots
* National Education Association
* United Mine Workers of America
Organizations
* BIPAC
* Everytown for Gun Safety
* Giffords
* Humane Society of the United States
* National Federation of Independent Business
* National Republican Congressional Committee "Patriot" Program
* United States Chamber of Commerce
U.S. Executive Branch officials
* Joe Biden, former vice president of the United States
* Barack Obama, former president of the United States
U.S. Senators
* Elizabeth Warren, U.S. Senator from Massachusetts (2013–present)
Labor unions
* Service Employees International Union
* United Auto Workers
* United Steelworkers
Organizations
* 21st Century Democrats
* Congressional Progressive Caucus
* Democratic Congressional Campaign Committee "Red to Blue" Program
* End Citizens United
* Friends of the Earth Action
* Indivisible
* J Street
* Moms Demand Action
* MoveOn
* National Organization for Women
* People for the American Way
* Planned Parenthood Action Fund
* Sierra Club
* Working Families Party
Local officials
* Diane Ellis-Marseglia, Bucks County commissioner
Organizations
* Firearm Owners Against Crime

#### Debate

2018 Pennsylvania's 1st congressional district debate :
| No. | Date | Host | Moderator | Link | Republican | Democratic |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | | |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Brian Fitzpatrick | Scott Wallace |
| 1 | October 19, 2018 | Bucks County Chamber of Commerce Pennsylvania Cable Network League of Women Voters of Bucks County | Carlo Borgia | | P | P |

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Brian Fitzpatrick (R) | Scott Wallace (D) | Other | Undecided |
| NYT Upshot/Siena College | October 26–29, 2018 | 502 | ± 4.7% | 47% | 46% | – | 7% |
| NYT Upshot/Siena College | October 11–14, 2018 | 570 | ± 4.6% | 43% | 50% | – | 8% |
| Public Opinion Strategies (R-Fitzpatrick) | October 2–4, 2018 | 400 | ± 4.9% | 50% | 42% | – | – |
| Monmouth University | September 27 – October 1, 2018 | 353 | ± 5.2% | 50% | 46% | 1% | 3% |
| Monmouth University | May 31 – June 3, 2018 | 254 LV | ± 6.5% | 48% | 47% | 0% | 5% |
| Monmouth University | May 31 – June 3, 2018 | 451 RV | ± 4.6% | 49% | 42% | 1% | 8% |
| DCCC (D) | May 12–14, 2018 | 540 | ± 4.2% | 48% | 46% | — | 6% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Tossup | November 5, 2018 |
| Inside Elections | Tossup | November 5, 2018 |
| Sabato's Crystal Ball | Lean R | November 5, 2018 |
| RCP | Tossup | November 5, 2018 |
| Daily Kos | Tossup | November 5, 2018 |
| 538 | Tossup | November 7, 2018 |
| CNN | Tossup | October 31, 2018 |
| Politico | Tossup | November 4, 2018 |

#### Results

Pennsylvania's 1st congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Republican | Brian Fitzpatrick (incumbent) | 169,053 | 51.26 |
| | Democratic | Scott Wallace | 160,745 | 48.74 |
| Total votes | Total votes | Total votes | 329,798 | 100.00 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

#### Analysis

Fitzpatrick held out to win re-election, despite many similar suburban districts held by Republicans falling to Democrats in the 2018 cycle. Fitzpatrick did this by establishing a reputation for himself as an independent centrist who attained endorsements from several usually-left-leaning and nonpartisan groups without enraging the more fervently pro-Trump wing of the Republican party. Analysts considered the Democratic nominee Scott Wallace an unusually weak candidate: he was a wealthy heir who moved to the district, opening up accusations of carpetbagging, and made several gaffes and missteps. Editor Dave Wasserman of the Cook Political Report wrote that Wallace was perhaps the weakest candidate of the 2018 cycle.

## District 2

The 2nd district consists of the northern half of Philadelphia. It mostly overlaps with the old 1st District. That district's incumbent, Democrat Bob Brady, had served since 1998, but did not run for reelection. The incumbent of the old 2nd district is Dwight Evans, but Evans opted to follow most of his constituents into the 3rd District.
The new map drew the home of fellow Democrat Brendan Boyle, who had represented the neighboring 13th District since 2015, into the 2nd, leading to speculation that he would run for reelection there. Soon after the new map was released, Boyle confirmed that he would indeed run in the 2nd.

### Democratic primary
#### Candidates
##### Nominee

* Brendan Boyle, incumbent U.S. Representative

##### Eliminated in primary

* Michele Lawrence, former Senior Vice President for Wells Fargo

##### Declined

* Bob Brady, incumbent U.S. Representative

#### Endorsements

Labor unions
* AFL-CIO
* Service Employees International Union

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Brendan Boyle (incumbent) | 23,261 | 64.5 |
| | Democratic | Michele Lawrence | 12,814 | 35.5 |
| Total votes | Total votes | Total votes | 36,075 | 100.0 |

### Republican primary
#### Candidates
##### Nominee

* David Torres, community activist

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | David Torres | 7,443 | 100.0 |
| Total votes | Total votes | Total votes | 7,443 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers
* Service Employees International Union
Organizations
* End Citizens United
* Sierra Club

#### Results

Pennsylvania's 2nd congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Brendan Boyle (incumbent) | 159,600 | 79.0 |
| | Republican | David Torres | 42,382 | 21.0 |
| Total votes | Total votes | Total votes | 201,982 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 3

The 3rd district was previously located in Northwestern Pennsylvania, but now covers downtown and northern Philadelphia, and overlaps with much of the previous 2nd district. The incumbent from the 2nd district is Democrat Dwight Evans, who had held office since 2016. Evans defeated incumbent Democratic Representative Chaka Fattah in the 2016 Democratic primary, and then went on to be elected with 90% in both the general election and a simultaneous special election for the remainder of the term after Fattah resigned.

### Democratic primary
#### Candidates
##### Nominee

* Dwight Evans, incumbent U.S. Representative

##### Eliminated in primary

* Kevin Johnson

#### Endorsements

Labor unions
* AFL-CIO
* Service Employees International Union

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Dwight Evans (incumbent) | 72,106 | 80.8 |
| | Democratic | Kevin Johnson | 17,153 | 19.2 |
| Total votes | Total votes | Total votes | 89,259 | 100.0 |

### Republican primary
#### Candidates
##### Nominee

* Bryan Leib

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Bryan E. Leib | 3,331 | 100.0 |
| Total votes | Total votes | Total votes | 3,331 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers
* Service Employees International Union
Organizations
* Sierra Club

#### Results

Pennsylvania's 3rd congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Dwight Evans (incumbent) | 287,610 | 93.4 |
| | Republican | Bryan E. Leib | 20,387 | 6.6 |
| Total votes | Total votes | Total votes | 307,997 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 4

The old 4th district was in South Central Pennsylvania, but the new 4th district is centered in Montgomery County. The district overlaps with the former 13th district. The incumbent from this district, Democrat Brendan Boyle, could have sought re-election in either this district or the new 2nd district, which absorbed his home and most of old 13th's share of Philadelphia. Boyle opted to run in the 2nd, making the 4th an open seat.

### Democratic primary

State Senator Daylin Leach had announced that he would run for Congress in the old 7th District, but was expected to switch races after his home was drawn into the new 4th. However, on February 24, 2018, Leach succumbed to pressures from fellow Democrats, including Governor Tom Wolf, to abandon his congressional campaign in the face of accusations of sexual harassment. However, he remained in his Pennsylvania Senate seat.

#### Candidates
##### Nominee

* Madeleine Dean, state representative

##### Eliminated in primary

* Shira Goodman, public policy advocate
* Joe Hoeffel, former U.S. Representative, nominee for Senate in 2004 and candidate for governor in 2010

##### Withdrawn

* Mary Jo Daley, state representative (endorsed Dean)
* Daylin Leach, state senator and candidate for the 13th district in 2014

##### Declined

* Allyson Schwartz, former U.S. Representative and candidate for governor in 2014

#### Endorsements

State legislators
* Mary Jo Daley, state representative
Labor unions
* AFL-CIO
* Service Employees International Union

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Madeleine Dean | 42,625 | 72.6 |
| | Democratic | Shira Goodman | 9,645 | 16.4 |
| | Democratic | Joe Hoeffel | 6,431 | 11.0 |
| Total votes | Total votes | Total votes | 58,701 | 100.0 |

### Republican primary
#### Candidates
##### Nominee

* Dan David, investor

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Dan David | 28,889 | 100.0 |
| Total votes | Total votes | Total votes | 28,889 | 100.0 |

### General election
#### Endorsements

Executive branch officials
* Barack Obama, 44th president of the United States (2009–2017)
State legislators
* Mary Jo Daley, state representative
Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers
* Service Employees International Union
Organizations
* Brady Campaign
* EMILY's List
* End Citizens United
* Sierra Club

#### Results

Pennsylvania's 4th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Madeleine Dean | 211,524 | 63.5 |
| | Republican | Dan David | 121,467 | 36.5 |
| Total votes | Total votes | Total votes | 332,991 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 5

The old 5th district was in North Central Pennsylvania, but the new 5th district consists of Delaware County, portions of southern Philadelphia, and a sliver of Montgomery County. The district overlaps with much of the old 7th district, whose incumbent Republican Representative Pat Meehan chose not to seek re-election, due to allegations regarding a sexual harassment complaint that was settled with the use of taxpayer funds, and subsequently resigned from office in April.

### Republican primary
#### Candidates
##### Nominee

* Pearl Kim, former Deputy Attorney General of Pennsylvania

##### Disqualified

* Paul Addis

##### Declined

* Pat Meehan, incumbent U.S. Representative

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Pearl Kim | 33,685 | 100.0 |
| Total votes | Total votes | Total votes | 33,685 | 100.0 |

### Democratic primary
#### Candidates
##### Nominee

* Mary Gay Scanlon, attorney and former Wallingford-Swarthmore School Board member

##### Eliminated in primary

* Larry Arata, teacher and environmental advocate
* Margo L. Davidson, state representative
* Thaddeus Kirkland, Mayor of Chester
* Richard Lazer, former Deputy Mayor of Philadelphia
* Lindy Li, financial manager and candidate for this seat in 2014
* Ashley Lunkenheimer, former assistant U.S. attorney in the Eastern District of Pennsylvania
* Molly Sheehan, scientist
* Greg Vitali, state representative
* Theresa Wright, entrepreneur

##### Withdrawn

* George Badey III, attorney and nominee for this seat in 2012
* Shelly Chauncey, attorney and former CIA agent (endorsed Lunkenheimer)
* Dan Muroff, attorney
* David Wertime, journalist

#### Endorsements

Local officials
* Jim Kenney, mayor of Philadelphia (2016–)
Labor unions
* AFL-CIO
* International Brotherhood of Electrical Workers Local 98
* Service Employees International Union
Labor unions
* Pennsylvania Conference of Teamsters
* United Association Local 690
Governors
* Ed Rendell, former Governor of Pennsylvania (2003–2011)

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Margo Davidson | Thaddeus Kirkland | Rich Lazer | Lindy Li | Ashley Lunkenheimer | Mary Gay Scanlon | Molly Sheehan | Greg Vitali | Theresa Wright | Other | Undecided |
| Chism Strategies Advocacy & Elections | May 2018 | 638 | ±3.8 | — | — | 7% | — | 11% | 22% | — | 17% | — | — | 57% |
| Independence Communications and Consulting | April 2018 | 858 | ±3.3 | — | — | 7% | 12% | 10% | 17% | 7% | 13% | — | 7% | 27% |
| Public Policy Polling (D-Vitali) | April 23–24, 2018 | 562 | — | 5% | 4% | 5% | — | 6% | 18% | 6% | 17% | 8% | 5% | 25% |

#### Forum

2018 Pennsylvania's 5th congressional district democratic primary candidate forum :
| No. | Date | Host | Moderator | Link | Democratic | Democratic | Democratic | Democratic | Democratic | Democratic | Democratic | Democratic | Democratic | Democratic | Democratic | Democratic | Democratic | Democratic |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | | | | | | | | | | | | | | |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Larry Arata | George Badey III | Shelly Chauncey | Margo L. Davidson | Thaddeus Kirkland | Richard Lazer | Lindy Li | Ashley Lunkenheimer | Dan Muroff | Mary Gay Scanlon | Molly Sheehan | Greg Vitali | David Wertime | Theresa Wright |
| 1 | April 5, 2018 | | | | P | P | P | P | P | P | P | P | P | P | P | P | P | A |
| 2 | May 1, 2018 | League of Women Voters of Central Delaware County | Jennifer Levy-Tatum | YouTube | P | W | W | P | A | A | P | P | W | P | P | P | W | P |

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mary Gay Scanlon | 16,804 | 28.4 |
| | Democratic | Ashley Lunkenheimer | 9,044 | 15.3 |
| | Democratic | Richard Lazer | 8,892 | 15.0 |
| | Democratic | Molly Sheehan | 6,099 | 10.3 |
| | Democratic | Greg Vitali | 5,558 | 9.4 |
| | Democratic | Lindy Li | 4,126 | 7.0 |
| | Democratic | Theresa Wright | 3,046 | 5.2 |
| | Democratic | Thaddeus Kirkland | 2,327 | 3.9 |
| | Democratic | Margo L. Davidson | 2,275 | 3.9 |
| | Democratic | Larry Arata | 913 | 1.5 |
| Total votes | Total votes | Total votes | 59,084 | 100.0 |

### General election
#### Debate

2018 Pennsylvania's 5th congressional district debate :
| No. | Date | Host | Moderator | Link | Democratic | Republican |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | | |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Mary Gay Scanlon | Pearl Kim |
| 1 | Oct. 25, 2018 | League of Women Voters of Central Delaware County Pennsylvania Cable Network | Heidi Gold | C-SPAN | P | P |

#### Endorsements

Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers
* Service Employees International Union
Organizations
* Brady Campaign
* EMILY's List
* End Citizens United
* MoveOn

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Likely D (flip) | November 5, 2018 |
| Inside Elections | Likely D (flip) | November 5, 2018 |
| Sabato's Crystal Ball | Safe D (flip) | November 5, 2018 |
| RCP | Likely D (flip) | November 5, 2018 |
| Daily Kos | Safe D (flip) | November 5, 2018 |
| 538 | Safe D (flip) | November 7, 2018 |
| CNN | Likely D (flip) | October 31, 2018 |
| Politico | Safe D (flip) | November 4, 2018 |

#### Results

Pennsylvania's 5th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mary Gay Scanlon | 198,639 | 65.2 |
| | Republican | Pearl Kim | 106,075 | 34.8 |
| Total votes | Total votes | Total votes | 304,714 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## District 6

The 6th district consists of Chester County and Reading. The incumbent is Republican Ryan Costello, who had represented the district since 2015. He was re-elected to a second term with 57% of the vote in 2016. On March 24, 2018, Costello announced that he would no longer seek re-election due to the growing Democratic voter demographic in the 6th district. Costello formally withdrew his name on March 27.

### Republican primary
#### Candidates
##### Nominee

* Greg McCauley

##### Withdrawn

* Ryan Costello, incumbent U.S. Representative

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Greg McCauley | 31,611 | 100.0 |
| Total votes | Total votes | Total votes | 31,611 | 100.0 |

### Democratic primary
#### Candidates
##### Nominee

* Chrissy Houlahan, former United States Air Force Captain, engineer and businesswoman

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Chrissy Houlahan | 34,947 | 100.0 |
| Total votes | Total votes | Total votes | 34,947 | 100.0 |

### General election
#### Endorsements

Executive branch officials
* Joe Biden, 47th Vice President of the United States (2009–2017), U.S. Senator from Delaware (1973–2009)
U.S. Senators
* Bob Casey Jr., U.S. Senator from Pennsylvania (2007–present), 34th Treasurer of Pennsylvania (2005–2007), 49th Auditor General of Pennsylvania (1997–2005)
U.S. Representatives
* Brendan Boyle, U.S. Representative from Pennsylvania's 13th congressional district (2015–2019), state representative from the 170th district (2009–2015)
* Matt Cartwright, U.S. Representative from Pennsylvania's 17th congressional district (2013–2019)
* Dwight Evans, U.S. Representative from Pennsylvania's 2nd congressional district (2016–2019), state representative from the 203rd district
* Conor Lamb, U.S. Representative from Pennsylvania's 18th congressional district (2018–2019)
State officials
* Jason Kander, 39th Missouri Secretary of State (2013–2017), host of Majority 54 and founder of Let America Vote
* Tom Wolf, 74th governor of Pennsylvania (2015–present)
Labor unions
* AFL-CIO
* American Federation of Teachers Pennsylvania
* Communications Workers of America
* International Brotherhood of Boilermakers
* Plumbers and Pipefitters Local 520
* Plumbers Local 690
* Service Employees International Union Pennsylvania State Council
* Sheet Metal Workers' Local Union No. 19
Organizations
* 314 Action
* Brady Campaign
* Democratic Congressional Campaign Committee "Red to Blue" Program
* EMILY's List
* End Citizens United
* Feminist Majority Political Action Committee
* Human Rights Campaign
* NARAL Pro-Choice America
* New Democrat Coalition
* New Politics
* Off the Sidelines
* Sierra Club
* VoteVets.org
* With Honor Fund
Local officials
* John Fetterman, mayor of Braddock (2006–2019) and Democratic nominee for lieutenant governor in 2018

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Likely D (flip) | November 5, 2018 |
| Inside Elections | Likely D (flip) | November 5, 2018 |
| Sabato's Crystal Ball | Safe D (flip) | November 5, 2018 |
| RCP | Likely D (flip) | November 5, 2018 |
| Daily Kos | Safe D (flip) | November 5, 2018 |
| 538 | Safe D (flip) | November 7, 2018 |
| CNN | Likely D (flip) | October 31, 2018 |
| Politico | Likely D (flip) | November 4, 2018 |

#### Results

Pennsylvania's 6th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Chrissy Houlahan | 177,704 | 58.9 |
| | Republican | Greg McCauley | 124,124 | 41.1 |
| Total votes | Total votes | Total votes | 301,828 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## District 7

The 7th district was formerly centered on Delaware County, but the new district consisted of much of the Lehigh Valley. The new 7th district overlapped with much of the former 15th district, which was represented by retired Republican Representative Charlie Dent, who resigned early.

### Republican primary
#### Candidates
##### Nominee

* Marty Nothstein, chairman of the Lehigh County Board of Commissioners

##### Eliminated in primary

* Dean Browning, former member of the Lehigh County Board of Commissioners

##### Withdrawn

* Ryan Mackenzie, state representative
* Mike Pries, Dauphin County commissioner
* Justin Simmons, state representative

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Marty Nothstein | 16,004 | 50.5 |
| | Republican | Dean Browning | 15,696 | 49.5 |
| Total votes | Total votes | Total votes | 31,700 | 100.0 |

### Democratic primary
#### Candidates
##### Nominee

* Susan Wild, former Allentown Solicitor

##### Eliminated in primary

* David Clark, Catasauqua resident
* Rick Daugherty, former chair of the Lehigh County Democratic Party and nominee for this seat in 2012 & 2016
* Greg Edwards, pastor
* John Morganelli, Northampton County District Attorney, candidate for Pennsylvania Attorney General in 2000, 2004 & 2016 and nominee in 2008
* Roger Ruggles, Easton city councilmember

#### Withdrawn

* David Weidman, Army veteran

#### Endorsements

U.S. Senators
* Bernie Sanders, U.S. Senator from Vermont (2007–present)
Labor unions
* Service Employees International Union
Organizations
* 350 Action
* Congressional Black Caucus
* Congressional Progressive Caucus
* Justice Democrats
* Our Revolution
* Working Families Party
State legislators
* Lisa Boscola, State Senator
U.S. Representative
* Lois Frankel, U.S. Representative from Florida's 21st congressional district
Statewide officials
* Ed Rendell, former governor of Pennsylvania
Organizations
* EMILY's List
* NARAL Pro-Choice America

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Susan Wild | 15,001 | 33.3 |
| | Democratic | John Morganelli | 13,565 | 30.1 |
| | Democratic | Greg Edwards | 11,510 | 25.6 |
| | Democratic | Roger Ruggles | 2,443 | 5.4 |
| | Democratic | Rick Daugherty | 1,718 | 3.8 |
| | Democratic | David Clark | 766 | 1.7 |
| Total votes | Total votes | Total votes | 45,003 | 100.0 |

### General election
#### Endorsements

Organizations
* BIPAC
* National Republican Congressional Committee "Young Guns" Program
Local officials
* Jim Martin, Lehigh County District Attorney
Executive branch officials
* Barack Obama, 44th president of the United States (2009–2017)
U.S. Representative
* Lois Frankel, U.S. Representative from Florida's 21st congressional district
Statewide officials
* Ed Rendell, former governor of Pennsylvania
Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers
* Service Employees International Union
Organizations
* Democratic Congressional Campaign Committee "Red to Blue" Program
* EMILY's List
* End Citizens United
* MoveOn
* NARAL Pro-Choice America
* Sierra Club
Celebrities
* Tim Heidecker, comedian

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Marty Nothstein (R) | Susan Wild (D) | Tim Silfies (L) | Undecided |
| Muhlenberg College | October 14–18, 2018 | 411 | ± 5.5% | 41% | 48% | 5% | – |
| DeSales University | September 28 – October 7, 2018 | 405 | ± 4.5% | 31% | 50% | 8% | 11% |
| NYT Upshot/Siena College | September 21–25, 2018 | 539 | ± 4.7% | 42% | 50% | – | 8% |
| Monmouth University | September 5–9, 2018 | 299 LV | ± 5.7% | 45% | 47% | 2% | 7% |
| Monmouth University | September 5–9, 2018 | 401 RV | ± 4.9% | 40% | 46% | 3% | 11% |
| Muhlenberg College | April 24 – May 3, 2018 | 408 | ± 5.5% | 31% | 42% | 5% | 21% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Lean D (flip) | November 5, 2018 |
| Inside Elections | Lean D (flip) | November 5, 2018 |
| Sabato's Crystal Ball | Lean D (flip) | November 5, 2018 |
| RCP | Lean D (flip) | November 5, 2018 |
| Daily Kos | Lean D (flip) | November 5, 2018 |
| 538 | Safe D (flip) | November 7, 2018 |
| CNN | Lean D (flip) | October 31, 2018 |
| Politico | Lean D (flip) | November 4, 2018 |

#### Results

Pennsylvania's 7th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Susan Wild | 140,813 | 53.5 |
| | Republican | Marty Nothstein | 114,437 | 43.5 |
| | Libertarian | Tim Silfies | 8,011 | 3.0 |
| Total votes | Total votes | Total votes | 263,261 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## District 8

The 8th district was previously centered on Bucks County, but now consists of portions of Northeastern Pennsylvania, including the city of Scranton. The new district overlaps with much of the former 17th district, which was represented by Democratic Representative Matt Cartwright. Cartwright had held office since 2013.

### Democratic primary
#### Candidates
##### Nominee

* Matt Cartwright, incumbent U.S. Representative

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Matt Cartwright (incumbent) | 36,040 | 100.0 |
| Total votes | Total votes | Total votes | 36,040 | 100.0 |

### Republican primary
#### Candidates
##### Nominee

* John Chrin, businessman

##### Eliminated in primary

* Robert Kuniegel
* Joe Peters, former federal prosecutor

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | John Chrin | 15,136 | 48.4 |
| | Republican | Joe Peters | 10,927 | 34.9 |
| | Republican | Robert Kuniegel | 5,218 | 16.7 |
| Total votes | Total votes | Total votes | 31,281 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers
* Service Employees International Union
Organizations
* Congressional Progressive Caucus
* End Citizens United
* MoveOn
* Sierra Club
Executive branch officials
* Mike Pence, 48th Vice President of the United States (2017–2021)
* Donald Trump, 45th President of the United States (2017–2021)
Organizations
* National Federation of Independent Business
* National Republican Congressional Committee "Young Guns" Program
* National Right to Life Committee
* NRA Political Victory Fund
State representatives
* Aaron Kaufer, state representative from the 120th district (2015–present)

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Matt Cartwright (D) | John Chrin (R) | Other | Undecided |
| Susquehanna Polling & Research | October 28–29, 2018 | 446 | ± 4.6% | 57% | 40% | 1% | 2% |
| NYT Upshot/Siena College | October 16–19, 2018 | 506 | ± 4.7% | 52% | 40% | – | 8% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Likely D | November 5, 2018 |
| Inside Elections | Lean D | November 5, 2018 |
| Sabato's Crystal Ball | Likely D | November 5, 2018 |
| RCP | Likely D | November 5, 2018 |
| Daily Kos | Likely D | November 5, 2018 |
| 538 | Safe D | November 7, 2018 |
| CNN | Likely D | October 31, 2018 |
| Politico | Likely D | November 4, 2018 |

#### Results

Pennsylvania's 8th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Matt Cartwright (incumbent) | 135,603 | 54.6 |
| | Republican | John Chrin | 112,563 | 45.4 |
| Total votes | Total votes | Total votes | 248,166 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 9

The old 9th district was in South Central Pennsylvania, but the new 9th district is in east central Pennsylvania. The new district overlaps with the old 11th district, which was represented by retiring Republican Representative Lou Barletta.

### Republican primary
#### Candidates
##### Nominee

* Dan Meuser, former Secretary of Revenue of Pennsylvania

##### Eliminated in primary

* George Halcovage Jr.
* Scott Uehlinger, delegate to the 2016 Republican National Convention

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Dan Meuser | 26,568 | 53.0 |
| | Republican | George Halcovage Jr. | 12,032 | 24.0 |
| | Republican | Scott Uehlinger | 11,541 | 23.0 |
| Total votes | Total votes | Total votes | 50,141 | 100.0 |

### Democratic primary
#### Candidates
##### Nominee

* Denny Wolff, former Secretary of Agriculture of Pennsylvania

##### Eliminated in primary

* Laura Quick, delivery driver
* Gary Wegman, dentist

#### Endorsements

Labor unions
* AFL-CIO

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Denny Wolff | 11,020 | 40.7 |
| | Democratic | Gary Wegman | 8,450 | 31.2 |
| | Democratic | Laura Quick | 7,616 | 28.1 |
| Total votes | Total votes | Total votes | 27,086 | 100.0 |

### General election
#### Debate

2018 Pennsylvania's 9th congressional district debate :
| No. | Date | Host | Moderator | Link | Republican | Democratic |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | | |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Dan Meuser | Denny Wolff |
| 1 | Oct. 30, 2018 | WVIA-TV | Larry Vojtko | YouTube | P | P |

#### Endorsements

Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers
* Service Employees International Union

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Dan Meuser (R) | Denny Wolff (D) | Other | Undecided |
| Susquehanna Polling and Research | October 23–25, 2018 | 271 | ± 5.9% | 57% | 36% | 1% | 6% |

#### Results

Pennsylvania's 9th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Republican | Dan Meuser | 148,723 | 59.7 |
| | Democratic | Denny Wolff | 100,204 | 40.3 |
| Total votes | Total votes | Total votes | 248,927 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 10

The 10th district was previously in Northeastern Pennsylvania, but it now overlaps with much of the former 4th district in South Central Pennsylvania. Under the map released in 2018, the 10th district includes Harrisburg and a portion of York County. The incumbent from the 4th district is Republican Scott Perry, who had represented his district since 2013. He was re-elected to a third term with 66% of the vote in 2016. Several Democrats sought to challenge Perry in 2018, with George Scott, a 20-year Army veteran and Lutheran pastor, receiving the party's nomination.

### Republican primary
#### Candidates
##### Nominee

* Scott Perry, incumbent U.S. Representative

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Scott Perry (incumbent) | 57,407 | 100.0 |
| Total votes | Total votes | Total votes | 57,407 | 100.0 |

### Democratic primary
#### Candidates
##### Nominee

* George Scott, Lutheran pastor and former Army Lt. Colonel

##### Eliminated in primary

* Shavonnia Corbin-Johnson, former assistant to the director for the Office of Management and Budget
* Eric Ding, public health scientist
* Alan Howe, Air Force veteran

##### Withdrawn

* Christina Hartman, former nonprofit executive and nominee for Pennsylvania's 16th congressional district in 2016

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | George Scott | 13,924 | 36.3 |
| | Democratic | Shavonnia Corbin-Johnson | 13,376 | 34.9 |
| | Democratic | Eric Ding | 6,912 | 18.0 |
| | Democratic | Alan Howe | 4,157 | 10.8 |
| Total votes | Total votes | Total votes | 38,369 | 100.0 |

### General election
#### Endorsements

Executive branch officials
* Donald Trump, 45th President of the United States (2017–2021)
Organizations
* Club for Growth
Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers
* Service Employees International Union
Organizations
* Democratic Congressional Campaign Committee "Red to Blue" Program
* End Citizens United
* Indivisible
* Sierra Club
* With Honor Fund

#### Debates

2018 Pennsylvania's 10th congressional district debates :
| No. | Date | Host | Moderator | Link | Republican | Democratic |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | | |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Scott Perry | George Scott |
| 1 | September 17, 2018 | Rotary Club of York | | | P | P |
| 2 | October 18, 2018 | American Association of University Women WGAL-TV | Janelle Stelson Mike Straub | | P | P |

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Scott Perry (R) | George Scott (D) | Other | Undecided |
| NYT Upshot/Siena College | October 23–26, 2018 | 498 | ± 4.7% | 45% | 43% | – | 12% |
| Susquehanna Polling and Research | October 19–21, 2018 | 366 | ± 5.2% | 49% | 46% | 1% | 4% |
| Public Policy Polling (D) | September 24–25, 2018 | 650 | – | 44% | 43% | – | 12% |
| Public Policy Polling (D-Scott) | June 8–10, 2018 | 654 | ± 4.1% | 45% | 41% | – | 14% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Tossup | November 5, 2018 |
| Inside Elections | Lean R | November 5, 2018 |
| Sabato's Crystal Ball | Lean R | November 5, 2018 |
| RCP | Tossup | November 5, 2018 |
| Daily Kos | Lean R | November 5, 2018 |
| 538 | Lean R | November 7, 2018 |
| CNN | Lean R | October 31, 2018 |
| Politico | Lean R | November 4, 2018 |

#### Results

Pennsylvania's 10th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Republican | Scott Perry (incumbent) | 149,365 | 51.3 |
| | Democratic | George Scott | 141,668 | 48.7 |
| Total votes | Total votes | Total votes | 291,033 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 11

The old 11th district was in Northeastern Pennsylvania, but the district now overlaps with much of the former 16th district in South Central Pennsylvania. The new district consists of Lancaster County and portions of York County. The incumbent from the former 16th district is Republican Lloyd Smucker, who had held office since 2017.

### Republican primary
#### Candidates
##### Nominee

* Lloyd Smucker, incumbent U.S. Representative

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Lloyd Smucker (incumbent) | 34,002 | 58.6 |
| | Republican | Chet Beiler | 24,063 | 41.4 |
| Total votes | Total votes | Total votes | 58,065 | 100.0 |

### Democratic primary

Christina Hartman, a former nonprofit executive who lost against Smucker in 16th had filed for a rematch; however, following the court-ordered redrawing, she considered switching to run in the more competitive 10th before withdrawing from the race altogether.

#### Candidates
##### Nominee

* Jess King, nonprofit director

##### Withdrawn

* John George, former Warwick superintendent
* Christina Hartman, former nonprofit executive and nominee for this seat in 2016
* Charles Klein, pharmacist and candidate for state representative in 2016

#### Endorsements

State legislators
* Mike Sturla, state representative
Statewide officials
* Katie McGinty, former chief of staff to Governor Tom Wolf, former Secretary of the Pennsylvania Department of Environmental Protection, candidate for the governorship in 2014 and nominee for Senate in 2016
* Ed Rendell, former governor of Pennsylvania
Organizations
* EMILY's List
* End Citizens United
State legislators
* Tom Houghton, former state representative and nominee for PA-16 seat in 2014
Labor unions
* Service Employees International Union
Organizations
* 350 Action
* Democracy for America
* Justice Democrats
Local officials
* Bill Peduto, Mayor of Pittsburgh

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jess King | 22,794 | 100.0 |
| Total votes | Total votes | Total votes | 22,794 | 100.0 |

### General election

Meteorologist Drew Anderson planned to run without party affiliation and expected to be listed that way on the November ballot. However, he failed to file papers in time, and was not in the race.

#### Debate

2018 Pennsylvania's 11th congressional district debate :
| No. | Date | Host | Moderator | Link | Republican | Democratic |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | | |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Lloyd Smucker | Jess King |
| 1 | Oct. 30, 2018 | Eastern York School District WGAL York County Economic Alliance | Janelle Stelson Mike Straub | | P | P |

#### Endorsements

U.S. Senators
* Bernie Sanders, U.S. Senator from Vermont (2007–present)
Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers
* Service Employees International Union
Organizations
* Climate Hawks Vote
* End Citizens United
* Indivisible
* Justice Democrats
* MoveOn
* Our Revolution
* Peace Action
* Sierra Club
* Sunrise Movement
* Working Families Party

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Lloyd Smucker (R) | Jess King (D) | Other | Undecided |
| Susquehanna Polling and Research | October 21–22, 2018 | 311 | ± 5.6% | 50% | 46% | 1% | 3% |
| Public Policy Polling (D-King) | September 12–13, 2018 | 552 | ± 4.2% | 44% | 35% | – | 21% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Safe R | November 5, 2018 |
| Inside Elections | Safe R | November 5, 2018 |
| Sabato's Crystal Ball | Safe R | November 5, 2018 |
| RCP | Safe R | November 5, 2018 |
| Daily Kos | Safe R | November 5, 2018 |
| 538 | Likely R | November 7, 2018 |
| CNN | Safe R | October 31, 2018 |
| Politico | Safe R | November 4, 2018 |

#### Results

Pennsylvania's 11th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Republican | Lloyd Smucker (incumbent) | 163,708 | 59.0 |
| | Democratic | Jess King | 113,876 | 41.0 |
| Total votes | Total votes | Total votes | 277,584 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 12

The old 12th district was in Southwestern Pennsylvania, but the new district is in North Central Pennsylvania. It overlaps with the former 10th district, which was represented by Republican Tom Marino. Marino had held office since 2011.

### Republican primary
#### Candidates
##### Nominee

* Tom Marino, incumbent U.S. Representative

##### Eliminated in primary

* Douglas McLinko

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Tom Marino (incumbent) | 39,537 | 67.0 |
| | Republican | Douglas McLinko | 19,435 | 33.0 |
| Total votes | Total votes | Total votes | 58,972 | 100.0 |

### Democratic primary
#### Candidates
##### Nominee

* Marc Friedenburg, teacher

##### Eliminated in primary

* Judith Herschel, certified drug and alcohol counselor

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Marc Friedenburg | 12,713 | 50.6 |
| | Democratic | Judith Herschel | 12,407 | 49.4 |
| Total votes | Total votes | Total votes | 25,120 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers

#### Results

Pennsylvania's 12th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Republican | Tom Marino (incumbent) | 161,047 | 66.0 |
| | Democratic | Marc Friedenburg | 82,825 | 34.0 |
| Total votes | Total votes | Total votes | 243,872 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 13

The old 13th district was in Southeastern Pennsylvania, but the new district is in Western Pennsylvania. The new district overlaps with much of the old 9th district, which was represented by retiring Republican Representative Bill Shuster.

### Republican primary
#### Candidates
##### Nominee

* John Joyce, physician

##### Eliminated in primary

* Stephen Bloom, state representative
* John Eichelberger, state senator
* Art Halvorson, businessman, Coast Guard veteran and candidate for this seat in 2014 & 2016
* Benjamin Hornberger, laborer and former Marine
* Doug Mastriano, retired Army colonel
* Travis Schooley, businessman and candidate for this seat in 2012 & 2014
* Bernard Washabaugh II

##### Declined

* Bill Shuster, incumbent U.S. Representative

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | John Joyce | 14,615 | 21.9 |
| | Republican | John Eichelberger | 13,101 | 19.6 |
| | Republican | Stephen Bloom | 12,195 | 18.3 |
| | Republican | Doug Mastriano | 10,485 | 15.7 |
| | Republican | Art Halvorson | 10,161 | 15.2 |
| | Republican | Travis Schooley | 3,030 | 4.5 |
| | Republican | Bernie Washabaugh | 1,908 | 2.9 |
| | Republican | Ben Hornberger | 1,182 | 1.8 |
| Total votes | Total votes | Total votes | 66,677 | 100.0 |

### Democratic primary
#### Candidates
##### Nominee

* Brent Ottaway

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Brent Ottaway | 21,096 | 100.0 |
| Total votes | Total votes | Total votes | 1,096 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | John Joyce (R) | Brent Ottaway (D) | Other | Undecided |
| Susquehanna Polling and Research | October 25–26, 2018 | 303 | ± 5.6% | 57% | 36% | 2% | 5% |

#### Results

Pennsylvania's 13th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Republican | John Joyce | 178,533 | 70.5 |
| | Democratic | Brent Ottaway | 74,733 | 29.5 |
| Total votes | Total votes | Total votes | 253,266 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 14

The old 14th district consisted of the city of Pittsburgh and parts of surrounding suburbs, but the new district consists of suburbs to the south and west of Pittsburgh. The district overlaps with much of the former 18th district. The winner of the 2018 special election, Democrat Conor Lamb, ran in the more competitive 17th district.

### Democratic primary
#### Candidates
##### Nominee

* Bibiana Boerio, businesswoman and chief of staff to former representative Joe Sestak

##### Eliminated in primary

* Tom Prigg
* Adam Sedlock, psychologist
* Bob Solomon, physician and candidate for this seat in 2018

##### Declined

* Conor Lamb, incumbent U.S. Representative (running in the 17th)

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Bibiana Boerio | 17,755 | 43.0 |
| | Democratic | Adam Sedlock | 9,944 | 24.1 |
| | Democratic | Bob Solomon | 7,831 | 19.0 |
| | Democratic | Tom Prigg | 5,724 | 13.9 |
| Total votes | Total votes | Total votes | 41,254 | 100.0 |

### Republican primary
#### Candidates
##### Nominee

* Guy Reschenthaler, state senator and candidate for this seat in 2018

##### Eliminated in primary

* Rick Saccone, state representative and nominee for this seat in 2018

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Guy Reschenthaler | 23,245 | 55.4 |
| | Republican | Rick Saccone | 18,734 | 44.6 |
| Total votes | Total votes | Total votes | 41,979 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* Communications Workers of America
Organizations
* Sierra Club
Labor unions
* International Brotherhood of Boilermakers

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Likely R (flip) | November 5, 2018 |
| Inside Elections | Likely R (flip) | November 5, 2018 |
| Sabato's Crystal Ball | Safe R (flip) | November 5, 2018 |
| RCP | Likely R (flip) | November 5, 2018 |
| Daily Kos | Safe R (flip) | November 5, 2018 |
| 538 | Safe R (flip) | November 7, 2018 |
| CNN | Safe R (flip) | October 31, 2018 |
| Politico | Safe R (flip) | November 4, 2018 |

#### Results

Pennsylvania's 14th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Republican | Guy Reschenthaler | 151,386 | 57.9 |
| | Democratic | Bibiana Boerio | 110,051 | 42.1 |
| Total votes | Total votes | Total votes | 261,437 | 100.0 |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

## District 15

The old 15th district was in Eastern Pennsylvania, but the new district is in Western Pennsylvania. The new district overlaps with much of the former 5th district, which was represented by Republican G.T. Thompson. Thompson had held office since 2009.

### Republican primary
#### Candidates
##### Nominee

* G.T. Thompson, incumbent U.S. Representative

##### Declined

* Dave Reed, Majority Leader of the Pennsylvania House of Representatives

##### Withdrew

* Ryan Mackenzie, Member of the Pennsylvania House of Representatives for the 134th district, withdrew in March following redistricting

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | G.T. Thompson (incumbent) | 44,893 | 100.0 |
| Total votes | Total votes | Total votes | 44,893 | 100.0 |

### Democratic primary
#### Candidates
##### Nominee

* Susan Boser, teacher

##### Eliminated in primary

* Wade Jodun

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Susan Boser | 20,135 | 74.5 |
| | Democratic | Wade Jodun | 6,902 | 25.5 |
| Total votes | Total votes | Total votes | 27,037 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers
Organizations
* Indivisible

#### Results

Pennsylvania's 15th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Republican | G.T. Thompson (incumbent) | 165,245 | 67.8 |
| | Democratic | Susan Boser | 78,327 | 32.2 |
| Total votes | Total votes | Total votes | 243,572 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 16

The former 16th district was in Southeastern Pennsylvania, but the redrawn 16th district is in Northwestern Pennsylvania, overlapping with the former 3rd district. The incumbent from the 3rd district was Republican Mike Kelly, who had represented the district since 2011. He was re-elected to a fourth term unopposed in 2016. Kelly had considered running for the U.S. Senate, but announced he would run for re-election instead.

### Republican primary
#### Candidates
##### Nominee

* Mike Kelly, incumbent U.S. Representative

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Mike Kelly (incumbent) | 39,412 | 98.7 |
| | Write-in | Write-in | 525 | 1.3 |
| Total votes | Total votes | Total votes | 39,937 | 100.0 |

### Democratic primary
#### Candidates
##### Nominee

* Ron DiNicola, U.S. Marine veteran, Erie County solicitor, nominee for Pennsylvania's 21st congressional district in 1996

##### Eliminated in primary

* Robert Multari, physician
* Chris Rieger, attorney

#### Endorsements

Labor unions
* Service Employees International Union

#### Debate

2018 Pennsylvania's 16th congressional district democratic primary debate :
| No. | Date | Host | Moderator | Link | Democratic | Democratic | Democratic |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | | | |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Ron DiNicola | Robert Multari | Chris Rieger |
| 1 | April 16, 2018 | Allegheny College Center for Political Participation The Meadville Tribune | Rick Green Keith Gushard Marley Parish | | P | P | P |

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Ron DiNicola | 23,480 | 59.7 |
| | Democratic | Chris Rieger | 9,758 | 24.8 |
| | Democratic | Robert Multari | 5,914 | 15.0 |
| | Write-in | Write-in | 172 | 0.4 |
| Total votes | Total votes | Total votes | 39,324 | 100.0 |

### General election
#### Endorsements

Newspapers
* Erie Times-News
Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers
* Service Employees International Union
Organizations
* Democratic Congressional Campaign Committee "Red to Blue" Program
* End Citizens United
* Human Rights Campaign
* National Committee to Preserve Social Security and Medicare
* Sierra Club

#### Debate

2018 Pennsylvania's 16th congressional district debate :
| No. | Date | Host | Moderator | Link | Republican | Democratic |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | | |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Mike Kelly | Ron DiNicola |
| 1 | October 8, 2018 | Mercyhurst University WKBN-TV | Sean Lafferty | | P | P |

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Mike Kelly (R) | Ron DiNicola (D) | Other | Undecided |
| Susquehanna Polling & Research | October 29–30, 2018 | 405 | ± 4.9% | 47% | 51% | 1% | 1% |
| DCCC (D) | October 9–10, 2018 | 548 | ± 4.2% | 49% | 46% | – | 5% |
| NYT Upshot/Siena College | October 5–8, 2018 | 532 | ± 4.8% | 50% | 42% | – | 8% |
| Normington, Petts & Associates (D-DiNicola) | June 5–7, 2018 | 400 | ± 4.9% | 50% | 44% | – | 6% |
| Public Policy Polling (D-DiNicola) | May 21–22, 2018 | 623 | ± 3.9% | 48% | 43% | – | 10% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Lean R | November 5, 2018 |
| Inside Elections | Likely R | November 5, 2018 |
| Sabato's Crystal Ball | Lean R | November 5, 2018 |
| RCP | Tossup | November 5, 2018 |
| Daily Kos | Lean R | November 5, 2018 |
| 538 | Likely R | November 7, 2018 |
| CNN | Lean R | October 31, 2018 |
| Politico | Lean R | November 4, 2018 |

#### Results

Pennsylvania's 16th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Republican | Mike Kelly (incumbent) | 135,348 | 51.5 |
| | Democratic | Ronald DiNicola | 124,109 | 47.3 |
| | Libertarian | Ebert "Bill" Beeman | 2,939 | 1.1 |
| | Write-in | Write-in | 167 | 0.1 |
| Total votes | Total votes | Total votes | 262,563 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 17

The former 17th district was in Northeastern Pennsylvania, but the new 17th district consists of suburbs west of Pittsburgh. The district overlaps with parts of the former 12th district, which was represented by Republican Keith Rothfus. Rothfus had held office since 2013, and ran for reelection in the new 17th.
The new map drew the home of Democrat Conor Lamb, who won a special election for the old 18th District, into the new 17th. The 17th is far less Republican than its predecessor, and voted for Democrats downballot, leading to speculation that Lamb would run for a full term in the 17th regardless of the special election result. On March 14, Democratic officials in Beaver County, which is entirely within the 17th, received a written request from Lamb for their endorsement in the 2018 general election. On March 20, Lamb formally filed to run for a full term in the 17th.

### Republican primary
#### Candidates
##### Nominee

* Keith Rothfus, incumbent U.S. Representative

#### Primary results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Keith Rothfus (incumbent) | 38,513 | 98.3 |
| | Write-in | Write-in | 649 | 1.7 |
| Total votes | Total votes | Total votes | 39,162 | 100.0 |

### Democratic primary
#### Candidates
##### Nominee

* Conor Lamb, incumbent U.S. Representative

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Conor Lamb (incumbent) | 52,590 | 99.1 |
| | Write-in | Write-in | 467 | 0.9 |
| Total votes | Total votes | Total votes | 53,057 | 100.0 |

### General election
#### Endorsements

Executive branch officials
* Donald Trump, 45th President of the United States (2017–2021)
Organizations
* BIPAC
* National Republican Congressional Committee "Patriot" Program
Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers
* Service Employees International Union
Organizations
* End Citizens United
* MoveOn
* With Honor Fund

#### Debate

2018 Pennsylvania's 17th congressional district debate :
| No. | Date | Host | Moderator | Link | Democratic | Republican |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | | |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Conor Lamb | Keith Rothfus |
| 1 | October 16, 2018 | WTAE-TV | Mike Clark | | P | P |

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Keith Rothfus (R) | Conor Lamb (D) | Other | Undecided |
| Monmouth University | October 5–8, 2018 | 354 | ± 5.2% | 42% | 54% | 0% | 4% |
| Monmouth University | July 19–22, 2018 | 355 LV | ± 5.2% | 40% | 53% | 2% | 5% |
| Monmouth University | July 19–22, 2018 | 401 RV | ± 4.9% | 39% | 51% | 2% | 9% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Likely D (flip) | November 5, 2018 |
| Inside Elections | Lean D (flip) | November 5, 2018 |
| Sabato's Crystal Ball | Likely D (flip) | November 5, 2018 |
| RCP | Likely D (flip) | November 5, 2018 |
| Daily Kos | Likely D (flip) | November 5, 2018 |
| 538 | Safe D (flip) | November 7, 2018 |
| CNN | Lean D (flip) | October 31, 2018 |
| Politico | Likely D (flip) | November 4, 2018 |

#### Results

Pennsylvania's 17th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Conor Lamb (incumbent) | 183,162 | 56.2 |
| | Republican | Keith Rothfus (incumbent) | 142,417 | 43.7 |
| | Write-in | Write-in | 184 | 0.1 |
| Total votes | Total votes | Total votes | 325,763 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## District 18

The 18th district formerly consisted of the southern suburbs of Pittsburgh, but the new district is now centered on Pittsburgh itself. The district overlaps with the former 14th district, which was represented by Democrat Michael F. Doyle. Doyle had held office since 1995. He ran unopposed in the general election.

### Democratic primary
#### Candidates
##### Nominee

* Michael F. Doyle, incumbent U.S. Representative

##### Eliminated in primary

* Janis C. Brooks, pastor, CEO/founder of Citizens to Abolish Domestic Apartheid and candidate for this seat in 2012, 2014 & 2016

#### Primary results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mike Doyle (incumbent) | 52,080 | 75.6 |
| | Democratic | Janis Brooks | 16,549 | 24.0 |
| | Write-in | Write-in | 260 | 0.4 |
| Total votes | Total votes | Total votes | 68,889 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* Communications Workers of America
* International Brotherhood of Boilermakers
* Service Employees International Union
Organizations
* Sierra Club

#### Results

Pennsylvania's 18th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mike Doyle (incumbent) | 231,472 | 96.1 |
| | Write-in | Write-in | 9,452 | 3.9 |
| Total votes | Total votes | Total votes | 240,924 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |