# 1998 United States Senate elections

The 1998 United States Senate elections were held on November 3, 1998, with the 34 seats of Class 3 contested in regular elections. This was seen as an even contest between the Republican Party and Democratic Party. While the Democrats had to defend more seats up for election, Republican attacks on the morality of President Bill Clinton failed to connect with voters and anticipated Republican gains did not materialize. The Republicans picked open seats up in Ohio and Kentucky and narrowly defeated Democratic incumbent Carol Moseley Braun (Illinois), but these were cancelled out by the Democrats' gain of an open seat in Indiana and defeats of Republican Senators Al D'Amato (New York) and Lauch Faircloth (North Carolina). The balance of the Senate remained unchanged at 55–45 in favor of the Republicans, thereby tying these election results with those of 1996 and 2004 as the highest number of Senate seats that the Republicans have held since 1920.
With Democrats gaining five seats in the House of Representatives, this marked the first time since 1934 that the party not in control of the White House failed to gain congressional seats in mid-term election cycles, which would also happen in 2002. These are the last Senate elections that resulted in no net change in the balance of power, the last time Democrats won a U.S. Senate race in South Carolina, and the last time both major parties were on the general election ballot in every race.

## Results summary

| 45 | 55 |
| Democratic | Republican |
| Parties | Parties | Parties | | | | | Total |
| Parties | Parties | Parties | Democratic | Republican | Libertarian | Other | Total |
| Last elections (1996) Before the elections | Last elections (1996) Before the elections | Last elections (1996) Before the elections | 45 | 55 | 0 | 0 | 100 |
| Not up | Not up | Not up | 27 | 39 | — | — | 66 |
| Up Class 3 (1992→1998) | Up Class 3 (1992→1998) | Up Class 3 (1992→1998) | 18 | 16 | — | — | 34 |
| | Incumbent retired | Incumbent retired | 3 | 2 | — | — | 5 |
| | | Held by same party | 1 | 1 | — | — | 2 |
| | | Replaced by other party | 1 Republican replaced by 1 Democrat 2 Democrats replaced by 2 Republicans | 1 Republican replaced by 1 Democrat 2 Democrats replaced by 2 Republicans | — | — | 3 |
| | | Result | 2 | 3 | — | — | 5 |
| | Incumbent ran | Incumbent ran | 15 | 14 | — | — | 29 |
| | | Won re-election | 14 | 12 | — | — | 26 |
| | | Lost re-election | 2 Republicans replaced by 2 Democrats 1 Democrat replaced by 1 Republican | 2 Republicans replaced by 2 Democrats 1 Democrat replaced by 1 Republican | — | — | 3 |
| | | Lost renomination, but held by same party | 0 | 0 | — | — | 0 |
| | | Result | 16 | 13 | — | — | 29 |
| | Total elected | Total elected | 18 | 16 | 0 | 0 | 34 |
| | Net gain/loss | Net gain/loss | | | | | 0 |
| | Nationwide vote | Nationwide vote | 26,768,699 | 25,346,613 | 419,452 | 1,580,287 | 54,115,051 |
| | | Share | 49.47% | 46.84% | 0.78% | 2.92% | 100% |
| | Result | Result | 45 | 55 | — | — | 100 |
Source: Office of the Clerk

## Gains, losses, and holds
### Retirements

Two Republicans and three Democrats retired instead of seeking re-election.
| State | Senator | Replaced by |
| Arkansas | Dale Bumpers | Blanche Lincoln |
| Idaho | Dirk Kempthorne | Mike Crapo |
| Indiana | Dan Coats | Evan Bayh |
| Kentucky | Wendell Ford | Jim Bunning |
| Ohio | John Glenn | George Voinovich |

### Defeats

One Democrat and two Republicans sought re-election but lost in the general election.
| State | Senator | Replaced by |
| Illinois | Carol Moseley Braun | Peter Fitzgerald |
| New York | Al D'Amato | Chuck Schumer |
| North Carolina | Lauch Faircloth | John Edwards |

### Post-election changes

Two Republicans died during the 106th Congress, and initially were all replaced by appointees.
| State | Senator | Replaced by |
| Georgia (Class 3) | Paul Coverdell | Zell Miller |
| Rhode Island (Class 1) | John Chafee | Lincoln Chafee |

## Change in composition
### Before the elections

| D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ | D$_9$ | D$_{10}$ |
| D$_{20}$ | D$_{19}$ | D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ |
| D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ | D$_{26}$ | D$_{27}$ | D$_{28}$ Ark. Retired | D$_{29}$ Calif. Ran | D$_{30}$ Conn. Ran |
| D$_{40}$ Ore. Ran | D$_{39}$ Ohio Retired | D$_{38}$ N.D. Ran | D$_{37}$ Nev. Ran | D$_{36}$ Md. Ran | D$_{35}$ La. Ran | D$_{34}$ Ky. Retired | D$_{33}$ Ill. Ran | D$_{32}$ Hawaii Ran | D$_{31}$ Fla. Ran |
| D$_{41}$ S.C. Ran | D$_{42}$ S.D. Ran | D$_{43}$ Vt. Ran | D$_{44}$ Wash. Ran | D$_{45}$ Wisc. Ran | R$_{55}$ Utah Ran | R$_{54}$ Pa. Ran | R$_{53}$ Okla. Ran | R$_{52}$ N.C. Ran | R$_{51}$ N.Y. Ran |
| R$_{51}$ N.Y. Ran |||||||||
| R$_{41}$ Alaska Ran | R$_{42}$ Ariz. Ran | R$_{43}$ Colo. Ran | R$_{44}$ Ga. Ran | R$_{45}$ Idaho Retired | R$_{46}$ Ind. Retired | R$_{47}$ Iowa Ran | R$_{48}$ Kans. Ran | R$_{49}$ Mo. Ran | R$_{50}$ N.H. Ran |
| R$_{40}$ Ala. Ran | R$_{39}$ | R$_{38}$ | R$_{37}$ | R$_{36}$ | R$_{35}$ | R$_{34}$ | R$_{33}$ | R$_{32}$ | R$_{31}$ |
| R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ | R$_{26}$ | R$_{27}$ | R$_{28}$ | R$_{29}$ | R$_{30}$ |
| R$_{20}$ | R$_{19}$ | R$_{18}$ | R$_{17}$ | R$_{16}$ | R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ |
| R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ | R$_6$ | R$_7$ | R$_8$ | R$_9$ | R$_{10}$ |

### After the elections

| D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ | D$_9$ | D$_{10}$ |
| D$_{20}$ | D$_{19}$ | D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ |
| D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ | D$_{26}$ | D$_{27}$ | D$_{28}$ Ark. Hold | D$_{29}$ Calif. Re-elected | D$_{30}$ Conn. Re-elected |
| D$_{40}$ Vt. Re-elected | D$_{39}$ S.D. Re-elected | D$_{38}$ S.C. Re-elected | D$_{37}$ Ore. Re-elected | D$_{36}$ N.D. Re-elected | D$_{35}$ Nev. Re-elected | D$_{34}$ Md. Re-elected | D$_{33}$ La. Re-elected | D$_{32}$ Hawaii Re-elected | D$_{31}$ Fla. Re-elected |
| D$_{41}$ Wash. Re-elected | D$_{42}$ Wisc. Re-elected | D$_{43}$ Ind. Gain | D$_{44}$ N.Y. Gain | D$_{45}$ N.C. Gain | R$_{55}$ Ohio Gain | R$_{54}$ Ky. Gain | R$_{53}$ Ill. Gain | R$_{52}$ Utah Re-elected | R$_{51}$ Pa. Re-elected |
| R$_{51}$ Pa. Re-elected |||||||||
| R$_{41}$ Alaska Re-elected | R$_{42}$ Ariz. Re-elected | R$_{43}$ Colo. Re-elected | R$_{44}$ Ga. Re-elected | R$_{45}$ Idaho Hold | R$_{46}$ Iowa Re-elected | R$_{47}$ Kans. Re-elected | R$_{48}$ Mo. Re-elected | R$_{49}$ N.H. Re-elected | R$_{50}$ Okla. Re-elected |
| R$_{40}$ Ala. Re-elected | R$_{39}$ | R$_{38}$ | R$_{37}$ | R$_{36}$ | R$_{35}$ | R$_{34}$ | R$_{33}$ | R$_{32}$ | R$_{31}$ |
| R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ | R$_{26}$ | R$_{27}$ | R$_{28}$ | R$_{29}$ | R$_{30}$ |
| R$_{20}$ | R$_{19}$ | R$_{18}$ | R$_{17}$ | R$_{16}$ | R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ |
| R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ | R$_6$ | R$_7$ | R$_8$ | R$_9$ | R$_{10}$ |
| Key | D$_#$ Democratic R$_#$ Republican |

## Race summary
### Special elections during the 105th Congress

There were no special elections in 1998.

### Elections leading to the next Congress

In these general elections, the winners were elected for the term beginning January 3, 1999; ordered by state.
All of the elections involved the Class 3 seats.
| State | Incumbent | Incumbent | Incumbent | Results | Candidates |
| State | Senator | Party | Electoral history | Results | Candidates |
| Alabama | Richard Shelby | Republican | 1986 1992 | Incumbent re-elected. | ▌Y Richard Shelby (Republican) 63.2% ▌Clayton Suddith (Democratic) 36.7% |
| Alaska | Frank Murkowski | Republican | 1980 1986 1992 | Incumbent re-elected. | ▌Y Frank Murkowski (Republican) 74.5% ▌Joe Sonneman (Democratic) 19.7% ▌Jeffrey Gottlieb (Green) 3.2% ▌Scott Kohlhaas (Libertarian) 2.3% |
| Arizona | John McCain | Republican | 1986 1992 | Incumbent re-elected. | ▌Y John McCain (Republican) 68.7% ▌Ed Ranger (Democratic) 27.2% Others ▌John C. Zajac (Libertarian) 2.3% ▌Bob Park (Reform) 1.8% |
| Arkansas | Dale Bumpers | Democratic | 1974 1980 1986 1992 | Incumbent retired. Democratic hold. | ▌Y Blanche Lincoln (Democratic) 55.1% ▌Fay Boozman (Republican) 42.2% ▌Charley E. Heffley (Reform) 2.7% |
| California | Barbara Boxer | Democratic | 1992 | Incumbent re-elected. | ▌Y Barbara Boxer (Democratic) 53% ▌Matt Fong (Republican) 43% Others ▌Ted Brown (Libertarian) 1.1% ▌Timothy R. Erich (Reform) 1% ▌H. Joseph Perrin, Sr. (American Independent) 0.7% ▌Ophie C. Beltran (Peace and Freedom) 0.6% ▌Brian M. Rees (Natural Law) 0.6% |
| Colorado | Ben Nighthorse Campbell | Republican | 1992 | Incumbent re-elected. | ▌Y Ben Nighthorse Campbell (Republican) 62.5% ▌Dottie Lamm (Democratic) 35.0% Others ▌David S. Segal (Libertarian) 1.0% ▌Kevin Swanson (American Constitution) 0.7% ▌Jeff Peckman (Natural Law) 0.3% ▌John Heckman (Concerns of People) 0.2% ▌Gary Swing (Pacifist) 0.1% |
| Connecticut | Chris Dodd | Democratic | 1980 1986 1992 | Incumbent re-elected. | ▌Y Chris Dodd (Democratic) 65.1% ▌Gary Franks (Republican) 32.4% Others ▌William Kozak (Concerned Citizens) 1.3% ▌Lois A. Grasso (Term Limits) 0.7% ▌Wildey Moore (Libertarian) 0.5% |
| Florida | Bob Graham | Democratic | 1986 1992 | Incumbent re-elected. | ▌Y Bob Graham (Democratic) 62.5% ▌Charlie Crist (Republican) 37.5% |
| Georgia | Paul Coverdell | Republican | 1992 | Incumbent re-elected. | ▌Y Paul Coverdell (Republican) 52.3% ▌Michael Coles (Democratic) 45.3% ▌Bertil Armin Loftman (Libertarian) 2.5% |
| Hawaii | Daniel Inouye | Democratic | 1962 1968 1974 1980 1986 1992 | Incumbent re-elected. | ▌Y Daniel Inouye (Democratic) 79.2% ▌Crystal Young (Republican) 17.8% ▌Lloyd Mallan (Libertarian) 3% |
| Idaho | Dirk Kempthorne | Republican | 1992 | Incumbent retired to run for Governor of Idaho. Republican hold. | ▌Y Mike Crapo (Republican) 69.5% ▌Bill Mauk (Democratic) 28.4% ▌George J. Mansfeld (Natural Law) 2% |
| Illinois | Carol Moseley Braun | Democratic | 1992 | Incumbent lost re-election. Republican gain. | ▌Y Peter Fitzgerald (Republican) 50.3% ▌Carol Moseley Braun (Democratic) 47.4% Others ▌Don A. Torgersen (Reform) 2.2% ▌Raymond W. Stalker (U.S. Taxpayers) 0.01% |
| Indiana | Dan Coats | Republican | 1989 (appointed) 1990 (special) 1992 | Incumbent retired. Democratic gain. | ▌Y Evan Bayh (Democratic) 63.7% ▌Paul Helmke (Republican) 34.8% ▌Rebecca Sink-Burris (Libertarian) 1.5% |
| Iowa | Chuck Grassley | Republican | 1980 1986 1992 | Incumbent re-elected. | ▌Y Chuck Grassley (Republican) 68.4% ▌David Osterberg (Democratic) 30.5% Others ▌Susan Marcus (Natural Law) 0.8% ▌Margaret Trowe (Socialist Workers) 0.3% |
| Kansas | Sam Brownback | Republican | 1996 (special) | Incumbent re-elected. | ▌Y Sam Brownback (Republican) 65.3% ▌Paul Feleciano Jr. (Democratic) 31.6% Others ▌Tom Oyler (Libertarian) 1.6% ▌Alvin Bauman (Reform) 1.5% |
| Kentucky | Wendell Ford | Democratic | 1974 1974 (appointed) 1980 1986 1992 | Incumbent retired. Republican gain. | ▌Y Jim Bunning (Republican) 49.7% ▌Scotty Baesler (Democratic) 49.2% ▌Charles R. Arbegust (Reform) 1.1% |
| Louisiana | John Breaux | Democratic | 1986 1992 | Incumbent re-elected. | ▌Y John Breaux (Democratic) 64% ▌Jim Donelon (Republican) 32% |
| Maryland | Barbara Mikulski | Democratic | 1986 1992 | Incumbent re-elected. | ▌Y Barbara Mikulski (Democratic) 70.5% ▌Ross Pierpont (Republican) 29.5% |
| Missouri | Kit Bond | Republican | 1986 1992 | Incumbent re-elected. | ▌Y Kit Bond (Republican) 52.7% ▌Jay Nixon (Democratic) 43.8% Others ▌Tamara Millay (Libertarian) 2.0% ▌Curtis Frazier (U.S. Taxpayers) 1.0% ▌James F. Newport (Reform) 0.5% |
| Nevada | Harry Reid | Democratic | 1986 1992 | Incumbent re-elected. | ▌Y Harry Reid (Democratic) 47.9% ▌John Ensign (Republican) 47.8% Others ▌Michael Cloud (Libertarian) 1.9% None of These Candidates 1.8% ▌Michael E. Williams (Natural Law) 0.6% |
| New Hampshire | Judd Gregg | Republican | 1992 | Incumbent re-elected. | ▌Y Judd Gregg (Republican) 67.8% ▌George Condodemetraky (Democratic) 28.2% Others ▌Brian Christeson (Libertarian) 2.4% ▌Roy Kendel (Independent) 1.5% |
| New York | Al D'Amato | Republican | 1980 1986 1992 | Incumbent lost re-election. Democratic gain. | ▌Y Chuck Schumer (Democratic) 54.6% ▌Al D'Amato (Republican) 44.1% Others ▌Corinne E. Kurtz (Marijuana Reform) 0.7% ▌Joel Kovel (Green) 0.3% ▌William P. McMillen (Libertarian) 0.2% ▌Rose Ana Berbeo (Socialist Workers) 0.1% |
| North Carolina | Lauch Faircloth | Republican | 1992 | Incumbent lost re-election. Democratic gain. | ▌Y John Edwards (Democratic) 51.2% ▌Lauch Faircloth (Republican) 47.0% ▌Barbara Howe (Libertarian) 1.8% |
| North Dakota | Byron Dorgan | Democratic-NPL | 1992 | Incumbent re-elected. | ▌Y Byron Dorgan (Democratic-NPL) 63.1% ▌Donna Nalewaja (Republican) 35.2% ▌Harley McLain (Libertarian) 1.7% |
| Ohio | John Glenn | Democratic | 1974 1974 (appointed) 1980 1986 1992 | Incumbent retired. Republican gain. | ▌Y George Voinovich (Republican) 56.5% ▌Mary Boyle (Democratic) 43.5% |
| Oklahoma | Don Nickles | Republican | 1980 1986 1992 | Incumbent re-elected. | ▌Y Don Nickles (Republican) 66.4% ▌Don Carroll (Democratic) 31.3% Others ▌Mike Morris (Independent) 1.8% ▌Argus W. Yandell, Jr. (Independent) 0.5% |
| Oregon | Ron Wyden | Democratic | 1996 (special) | Incumbent re-elected. | ▌Y Ron Wyden (Democratic) 61% ▌John Lim (Republican) 33.8% Others ▌Karen Moskowitz (Green) 2.0% ▌Jim Brewster (Libertarian) 1.6% ▌Michael A. Campbell (Natural Law) 0.8% ▌Dean M. Braa (Socialist) 0.7% |
| Pennsylvania | Arlen Specter | Republican | 1980 1986 1992 | Incumbent re-elected. | ▌Y Arlen Specter (Republican) 61.3% ▌Bill Lloyd (Democratic) 34.8% Others ▌Dean Snyder (Constitution) 2.3% ▌Jack Iannantuono (Libertarian) 1.6% |
| South Carolina | Fritz Hollings | Democratic | 1966 (special) 1968 1974 1980 1986 1992 | Incumbent re-elected. | ▌Y Fritz Hollings (Democratic) 52.7% ▌Bob Inglis (Republican) 45.7% ▌Richard Quillian (Libertarian) 1.6% |
| South Dakota | Tom Daschle | Democratic | 1986 1992 | Incumbent re-elected. | ▌Y Tom Daschle (Democratic) 62.1% ▌Ron Schmidt (Republican) 36.4% ▌Byron Dale (Libertarian) 1.4% |
| Utah | Bob Bennett | Republican | 1992 | Incumbent re-elected. | ▌Y Bob Bennett (Republican) 64% ▌Scott Leckman (Democratic) 33% ▌Gary R. Van Horn (Independent American) 3% |
| Vermont | Patrick Leahy | Democratic | 1974 1980 1986 1992 | Incumbent re-elected. | ▌Y Patrick Leahy (Democratic) 72.2% ▌Fred Tuttle (Republican) 22.5% Others ▌Hugh Douglas (Libertarian) 2.0% ▌Barry M. Nelson (Independent) 1.4% ▌Bob Melamede (Vermont Grassroots) 1.2% ▌Jerry Levy (Liberty Union) 0.6% |
| Washington | Patty Murray | Democratic | 1992 | Incumbent re-elected. | ▌Y Patty Murray (Democratic) 58.4% ▌Linda Smith (Republican) 41.6% |
| Wisconsin | Russ Feingold | Democratic | 1992 | Incumbent re-elected. | ▌Y Russ Feingold (Democratic) 50.6% ▌Mark Neumann (Republican) 48.4% Others ▌Robert R. Raymond (U.S. Taxpayers) 0.5% ▌Tom Ender (Libertarian) 0.3% ▌Eugene A. Hem (Independent) 0.2% |

## Closest races

Eight races had a margin of less than 10%:
| State | Party of winner | Margin |
| Nevada | Democratic | 0.09% |
| Kentucky | Republican (flip) | 0.59% |
| Wisconsin | Democratic | 2.1% |
| Illinois | Republican (flip) | 2.9% |
| North Carolina | Democratic (flip) | 4.1% |
| South Carolina | Democratic | 7.0% |
| Georgia | Republican | 7.2% |
| Missouri | Republican | 8.9% |
Ohio was the tipping point state with a margin of 13%.

## Alabama

Incumbent Republican Richard Shelby won re-election to a third term. Shelby had been elected in 1986 and 1992 as a Democrat, but switched to the Republican party in 1994, making this the first election he competed in as a Republican. He beat Democrat Clayton Suddith, an army veteran and former Franklin County Commissioner.
1998 United States Senate election in Alabama :
| Party | Party | Candidate | Votes | % |
| | Republican | Richard Shelby (Incumbent) | 817,973 | 63.2% |
| | Democratic | Clayton Suddith | 474,568 | 36.7% |
| | Independent | Write-ins | 864 | 0.1% |
| Majority | Majority | Majority | 343,405 | 26.5% |
| Turnout | Turnout | Turnout | 1,293,405 | 100.0% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Alaska

Incumbent Republican Frank Murkowski easily won re-election to a fourth term against Democratic nominee Joseph Sonneman, a perennial candidate, earning nearly 75% of the vote.
Open primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Frank Murkowski (Incumbent) | 76,649 | 71.76% |
| | Democratic | Joseph Sonneman | 10,721 | 10.04% |
| | Democratic | Frank Vondersaar | 6,342 | 5.94% |
| | Republican | William L. Hale | 6,313 | 5.91% |
| | Green | Jeffrey Gottlieb | 4,796 | 4.49% |
| | Libertarian | Scott A. Kohlhaas | 1,987 | 1.86% |
| Total votes | Total votes | Total votes | 106,808 | 100.00% |
| | Republican hold | Republican hold | Republican hold | Republican hold |
1998 United States Senate election in Alaska :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Frank Murkowski (Incumbent) | 165,227 | 74.49% | +21.44% |
| | Democratic | Joe Sonneman | 43,743 | 19.72% | −18.68% |
| | Green | Jeffrey Gottlieb | 7,126 | 3.21% | −5.14% |
| | Libertarian | Scott A. Kohlhaas | 5,046 | 2.27% | |
| | Write-ins | | 665 | 0.30% | |
| Majority | Majority | Majority | 121,484 | 54.77% | +40.13% |
| Turnout | Turnout | Turnout | 221,807 | | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Arizona

Incumbent Republican John McCain won re-election to a third term over Democratic attorney Ed Ranger.
General election result :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | John McCain (Incumbent) | 696,577 | 68.74% | +12.93% |
| | Democratic | Ed Ranger | 275,224 | 27.16% | −4.41% |
| | Libertarian | John C. Zajac | 23,004 | 2.27% | +0.63% |
| | Reform | Bob Park | 18,288 | 1.80% | |
| | Write-ins | | 187 | 0.02% | |
| Majority | Majority | Majority | 421,353 | 41.58% | +17.34% |
| Turnout | Turnout | Turnout | 1,013,280 | | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Arkansas

Incumbent Dale Bumpers retired. U.S. Representative Blanche Lincoln won the open seat.
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Blanche Lincoln | 145,009 | 45.5% |
| | Democratic | Winston Bryant | 87,183 | 27.4% |
| | Democratic | Scott Ferguson | 44,761 | 14.0% |
| | Democratic | Nate Coulter | 41,848 | 13.1% |
| Total votes | Total votes | Total votes | 318,801 | 100.00% |
Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Fay Boozman | 128,929 | 78.0% |
| | Republican | Tom Prince | 44,006 | 22.0% |
| Total votes | Total votes | Total votes | 172,035 | 100.00% |
Arkansas Senate election 1998 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Blanche Lincoln | 385,878 | 55.1% |
| | Republican | Fay Boozman | 295,870 | 42.2% |
| | Reform | Charley E. Heffley | 18,896 | 2.7% |
| Majority | Majority | Majority | 90,008 | 12.9% |
| Turnout | Turnout | Turnout | 700,644 | 100.0% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## California

Incumbent Democrat Barbara Boxer won re-election to a second term.
1998 United States Senate Democratic primary, California :
| Candidate | Candidate | Votes | % |
| Barbara Boxer (Incumbent) | Barbara Boxer (Incumbent) | 2,574,264 | 92.15% |
| John Pinkerton | John Pinkerton | 219,250 | 7.85% |
| Total votes | Total votes | 2,793,514 | 100.00% |
1998 United States Senate Republican primary, California :
| Candidate | Candidate | Votes | % |
| Matt Fong | Matt Fong | 1,292,662 | 45.28% |
| Darrell Issa | Darrell Issa | 1,142,567 | 40.02% |
| Frank Riggs | Frank Riggs | 295,886 | 10.36% |
| John M. Brown | John M. Brown | 48,941 | 1.71% |
| Mark Raus | Mark Raus | 45,480 | 1.59% |
| Linh Dao | Linh Dao | 29,241 | 1.02% |
| Total votes | Total votes | 2,854,777 | 100.00% |
1998 United States Senate primary, California (Others) :
| Party | Candidate | Votes | % |
| Libertarian | Ted Brown | 67,408 | 100.00% |
| Peace and Freedom | Ophie C. Beltran | 52,306 | 100.00% |
| Reform | Timothy R. Erich | 45,601 | 100.00% |
| American Independent | Joseph Perrin, Sr. | 24,026 | 100.00% |
| Natural Law | Brian M. Rees | 23,945 | 100.00% |
Although the race was predicted to be fairly close, Boxer still defeated Fong by a ten-point margin. Boxer as expected did very well in Los Angeles County, and the San Francisco Bay Area.
1998 United States Senate election, California :
| Party | Party | Candidate | Votes | % |
| | Democratic | Barbara Boxer (Incumbent) | 4,410,056 | 53.06% |
| | Republican | Matt Fong | 3,575,078 | 43.01% |
| | Libertarian | Ted Brown | 93,926 | 1.13% |
| | Reform | Timothy R. Erich | 82,918 | 1.00% |
| | American Independent | Joseph Perrin, Sr. | 54,699 | 0.66% |
| | Peace and Freedom | Ophie C. Beltran | 48,685 | 0.56% |
| | Natural Law | Brian M. Rees | 46,543 | 0.59% |
| Total votes | Total votes | Total votes | 8,311,905 | 100.00% |
| Turnout | Turnout | Turnout | | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Colorado

Incumbent Republican Ben Nighthorse Campbell won re-election to a second term.
Colorado Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Dottie Lamm | 84,929 | 57.98% |
| | Democratic | Gil Romero | 61,548 | 42.02% |
| Total votes | Total votes | Total votes | 146,477 | 100.00% |
Colorado Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Ben Nighthorse Campbell (Incumbent) | 154,702 | 70.62% |
| | Republican | Bill Eggert | 64,347 | 29.38% |
| Total votes | Total votes | Total votes | 219,049 | 100.00% |
Campbell, who was elected in 1992 as a Democrat, switched parties after the 1994 Republican Revolution. He faced a primary challenger, but won with over 70% of the vote. In the general election, Democratic nominee Dottie Lamm criticized Campbell of flip flopping from being a moderate liberal to moderate conservative. In fact, throughout the entire campaign, Lamm mostly sent out negative attack advertisements about Campbell.
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Ben Nighthorse Campbell (Incumbent) | 829,370 | 62.49% | +19.78% |
| | Democratic | Dottie Lamm | 464,754 | 35.02% | −16.76% |
| | Libertarian | David S. Segal | 14,024 | 1.06% | +1.06% |
| | Constitution | Kevin Swanson | 9,775 | 0.74% | |
| | Natural Law | Jeffrey Peckham | 4,101 | 0.31% | |
| | Independent | John Heckman | 3,230 | 0.24% | |
| | Independent | Gary Swing | 1,981 | 0.15% | |
| Majority | Majority | Majority | 364,616 | 27.47% | +18.40% |
| Turnout | Turnout | Turnout | 1,327,235 | | |
| | Republican hold | Republican hold | Swing | | |

## Connecticut

Incumbent Democrat Chris Dodd won re-election for a fourth term against former Republican U.S. Congressman Gary A. Franks.
Connecticut Senate election 1998 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Chris Dodd (Incumbent) | 628,306 | 65.2% |
| | Republican | Gary A. Franks | 312,177 | 32.4% |
| | Concerned Citizens | William Kozak | 12,261 | 1.3% |
| | Independent | Lois A. Grasso | 6,517 | 0.7% |
| | Libertarian | Wildey J. Moore | 5,196 | 0.5% |
| Majority | Majority | Majority | 316,129 | 32.8% |
| Turnout | Turnout | Turnout | 964,457 | 100.0% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Florida

Incumbent Democrat Bob Graham won re-election to a third term.
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Bob Graham (Incumbent) | 909,349 | 100.00% |
Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Charlie Crist | 365,894 | 66.40% |
| | Republican | Andy Martin | 184,739 | 33.60% |
| Total votes | Total votes | Total votes | 550,633 | 100.00% |
Graham defeated Crist in a landslide, as Crist won just four counties in the state. There were no third party or independent candidates.
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Daniel Robert Graham (incumbent) | 2,436,407 | 62.47% | −2.93% |
| | Republican | Charles Joseph Crist, Jr. | 1,463,755 | 37.53% | +2.94% |
| Majority | Majority | Majority | 972,652 | 24.94% | −5.87% |
| Turnout | Turnout | Turnout | 3,900,162 | 46.84% | |
| Total votes | Total votes | Total votes | 3,900,162 | 100.00% | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Georgia

Incumbent Republican Paul Coverdell won re-election to a second term.
1998 Georgia United States Senate election :
| Party | Party | Candidate | Votes | % |
| | Republican | Paul Coverdell (Incumbent) | 918,540 | 52.37% |
| | Democratic | Michael Coles | 791,904 | 45.15% |
| | Libertarian | Bert Loftman | 43,467 | 2.48% |
| | Socialist Workers | Daniel Fein (write-in) | 42 | 0.00% |
| Majority | Majority | Majority | 126,636 | 7.22% |
| Turnout | Turnout | Turnout | 1,753,953 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Hawaii

Incumbent Democrat Daniel Inouye won re-election to a seventh term over Republican legislative aide Crystal Young.
General election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Daniel Inouye (Incumbent) | 315,252 | 79.2% |
| | Republican | Crystal Young | 70,964 | 17.8% |
| | Libertarian | Lloyd Jeffrey Mallan | 11,908 | 3.0% |
| Majority | Majority | Majority | 244,288 | 61.4% |
| Turnout | Turnout | Turnout | 398,124 | 100.0% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Idaho

Incumbent Republican Dirk Kempthorne decided to retire after one term to run for governor. Republican nominee Mike Crapo won the open seat.
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Bill Mauk | 22,503 | 100.00% |
| Total votes | Total votes | Total votes | 22,503 | 100.00% |
Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Mike Crapo | 110,205 | 87.27% |
| | Republican | Matt Lambert | 16,075 | 12.73% |
| Total votes | Total votes | Total votes | 126,280 | 100.00% |
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Mike Crapo | 262,966 | 69.54% | +13.01% |
| | Democratic | Bill Mauk | 107,375 | 28.39% | −15.08% |
| | Natural Law | George J. Mansfeld | 7,833 | 2.07% | |
| Majority | Majority | Majority | 155,591 | 41.14% | +28.10% |
| Turnout | Turnout | Turnout | 378,174 | | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Illinois

Incumbent Democrat Carol Moseley Braun decided to run for re-election, despite the number of controversies that she had in her first term. Republican State Senator Peter Fitzgerald won his party's primary with a slim margin of victory.
He ended up defeating the incumbent, with a margin of victory of approximately 3%. Peter Fitzgerald won all but five counties.
During Moseley Braun's term as U.S. Senator, she was plagued by several major controversies. Moseley Braun was the subject of a 1993 Federal Election Commission investigation over $249,000 in unaccounted-for campaign funds. The agency found some small violations, but took no action against Moseley Braun, citing a lack of resources. Moseley Braun only admitted to bookkeeping errors. The Justice Department turned down two requests for investigations from the IRS.
In 1996, Moseley Braun made a private trip to Nigeria, where she met with dictator Sani Abacha. Despite U.S. sanctions against that country, due to Abacha's actions, the Senator did not notify, nor register her trip with, the State Department. She subsequently defended Abacha's human rights records in Congress.
Peter Fitzgerald, a State Senator, won the Republican primary, defeating Illinois Comptroller Loleta Didrickson with 51.8% of the vote, to Didrickson's 48.2%. Fitzgerald spent nearly $7 million in the Republican primary. He had a major financial advantage, as he was a multimillionaire. He ended up spending $12 million in his election victory.
In September, Moseley Braun created controversy again by using the word "nigger" to describe how she claims to be a victim of racism.
Most polls over the first few months showed Moseley Braun trailing badly. However, after she was helped in the final month by notable Democrats such as First Lady Hillary Clinton and U.S. Congressman Luis V. Gutierrez, three polls published in the last week showed her within the margin of error, and, in one poll, running even with Fitzgerald.
Moseley Braun was narrowly defeated by Republican Peter Fitzgerald. Moseley Braun only won five of Illinois's 102 counties. Despite this, the race was kept close by Moseley running up massive margins in Cook County, home of Chicago. However, it was not quite enough to win.
1998 Illinois United States Senate election :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Peter Fitzgerald | 1,709,041 | 50.35% | +7.4% |
| | Democratic | Carol Moseley Braun (Incumbent) | 1,610,496 | 47.44% | −5.6% |
| | Reform | Don Torgersen | 74,704 | 2.20% | 0.00% |
| | US Taxpayers | Raymond Stalker | 280 | 0.01% | 0.00% |
| Majority | Majority | Majority | 98,545 | 2.91% | 0.00% |
| Turnout | Turnout | Turnout | 3,394,521 | | |
| | Republican gain from Democratic | Republican gain from Democratic | Swing | | |

## Indiana

Incumbent Republican Dan Coats decided to retire instead of seeking a second full term. Democratic nominee, former Governor Evan Bayh won the open seat his father once held.
General election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Evan Bayh | 1,012,244 | 63.7% |
| | Republican | Paul Helmke | 552,732 | 34.8% |
| | Libertarian | Rebecca Sink-Burris | 23,641 | 1.5% |
| Majority | Majority | Majority | 459,512 | |
| Turnout | Turnout | Turnout | 1,588,617 | |
| | Democratic gain from Republican | Democratic gain from Republican | Swing | |

## Iowa

Incumbent Republican Chuck Grassley sought re-election to a fourth term in the United States Senate, facing off against former State Representative David Osterberg, who won the Democratic nomination unopposed. Grassley had not faced a competitive election since 1980; this year proved no different, and Grassley crushed Osterberg to win a fourth term.
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | David Osterberg | 86,064 | 99.45% |
| | Democratic | Write-ins | 476 | 0.55% |
| Total votes | Total votes | Total votes | 86,540 | 100.00% |
Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Chuck Grassley (Incumbent) | 149,943 | 99.72% |
| | Republican | Write-ins | 419 | 0.28% |
| Total votes | Total votes | Total votes | 150,362 | 100.00% |
1998 United States Senate election in Iowa :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Chuck Grassley (Incumbent) | 648,480 | 68.41% | −1.20% |
| | Democratic | David Osterberg | 289,049 | 30.49% | +3.29% |
| | Natural Law | Susan Marcus | 7,561 | 0.80% | −0.47% |
| | Socialist Workers | Margaret Trowe | 2,542 | 0.27% | +0.16% |
| | Write-ins | | 275 | 0.03% | |
| Majority | Majority | Majority | 359,431 | 37.92% | −4.50% |
| Turnout | Turnout | Turnout | 947,907 | | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Kansas

Incumbent Republican Sam Brownback won re-election to his first full term. Brownback was first elected in a special election held in 1996, when then-Senator Bob Dole resigned to campaign for U.S. President, after 27 years in the Senate. This would've been Dole's seventh term in office had he remained in his seat.
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Paul Feleciano, Jr. | 58,097 | 58.73% |
| | Democratic | Todd Covault | 40,825 | 41.27% |
| Total votes | Total votes | Total votes | 98,922 | 100.00% |
Republican Party primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Sam Brownback (Incumbent) | 255,747 | 100.00% |
| Total votes | Total votes | Total votes | 255,747 | 100.00% |
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Sam Brownback (Incumbent) | 474,639 | 65.27% | +11.35% |
| | Democratic | Paul Feleciano, Jr. | 229,718 | 31.59% | −11.74% |
| | Libertarian | Tom Oyler | 11,545 | 1.59% | |
| | Reform | Alvin Bauman | 11,334 | 1.56% | −1.20% |
| Majority | Majority | Majority | 244,921 | 33.68% | +23.10% |
| Turnout | Turnout | Turnout | 727,236 | | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Kentucky

Incumbent Democratic U.S Senator Wendell Ford decided to retire, instead of seeking a fifth term. Republican Representative Jim Bunning won the open seat.
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Scotty Baesler | 194,125 | 34.16% |
| | Democratic | Charlie Owen | 166,472 | 29.29% |
| | Democratic | Steve Henry | 156,576 | 27.55% |
| | Democratic | Jim Brown | 19,975 | 3.51% |
| | Democratic | David L. Williams | 16,366 | 2.88% |
| | Democratic | Ken Buchanan Thompson | 14,778 | 2.60% |
| Total votes | Total votes | Total votes | 568,292 | 100.00% |
Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Jim Bunning | 152,493 | 74.28% |
| | Republican | Barry Metcalf | 52,798 | 25.72% |
| Total votes | Total votes | Total votes | 205,291 | 100.00% |
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Jim Bunning | 569,817 | 49.75% | +13.94% |
| | Democratic | Scotty Baesler | 563,051 | 49.16% | −13.73% |
| | Reform | Charles R. Arbegust | 12,546 | 1.10% | |
| Majority | Majority | Majority | 6,766 | 0.59% | −26.48% |
| Total votes | Total votes | Total votes | 1,145,414 | 100.00% | |
| | Republican gain from Democratic | Republican gain from Democratic | Swing | | |

## Louisiana

Incumbent Democrat John Breaux won re-election to a third term. As of 2022, this is the last time the Democrats have won the Class 3 Senate Seat from Louisiana.
1998 Louisiana United States Senate election :
| Party | Party | Candidate | Votes | % |
| | Democratic | John Breaux (Incumbent) | 620,502 | 64.0% |
| | Republican | Jim Donelon | 306,616 | 31.6% |
| | Independent | Raymond Brown | 12,203 | 1.3% |
| | Independent | Sam Houston Melton | 9,893 | 1.0% |
| | Independent | Darryl Paul Ward | 7,964 | 0.8% |
| | Independent | L. D. Knox | 6,366 | 0.7% |
| | Independent | Jeffrey H. Diket | 3,227 | 0.3% |
| | Independent | Martin A. Rosenthal | 2,398 | 0.3% |
| Majority | Majority | Majority | 313,886 | 32.4% |
| Turnout | Turnout | Turnout | 969,169 | 100.0% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Maryland

Incumbent Democrat Barbara Mikulski won re-election to a third term.
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Barbara A. Mikulski (Incumbent) | 349,382 | 84.36% |
| | Democratic | Ann L. Mallory | 43,120 | 10.41% |
| | Democratic | Kauko H. Kokkonen | 21,658 | 5.23% |
| Total votes | Total votes | Total votes | 414,160 | 100.00% |
Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Ross Z. Pierpont | 32,691 | 18.40% |
| | Republican | John Taylor | 22,855 | 12.87% |
| | Republican | Michael Gloth | 19,926 | 11.22% |
| | Republican | Kenneth Wayman | 16,505 | 9.29% |
| | Republican | Bradlyn McClanahan | 16,439 | 9.25% |
| | Republican | Howard David Greyber | 16,177 | 9.11% |
| | Republican | John Stafford | 15,031 | 8.46% |
| | Republican | George Liebmann | 14,440 | 8.13% |
| | Republican | Barry Steve Asbury | 11,881 | 6.69% |
| | Republican | Thomas Scott | 11,707 | 6.59% |
| Total votes | Total votes | Total votes | 177,652 | 100.00% |
1998 United States Senate election in Maryland :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Barbara A. Mikulski (Incumbent) | 1,062,810 | 70.50% | −0.51% |
| | Republican | Ross Z. Pierpont | 444,637 | 29.50% | +0.51% |
| Majority | Majority | Majority | 618,173 | 41.01% | −1.02% |
| Total votes | Total votes | Total votes | 1,507,447 | 100.00% | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Missouri

Incumbent Republican Kit Bond won re-election to a third term.
General election results :
| Party | Party | Candidate | Votes | % |
| | Republican | Kit Bond (Incumbent) | 830,625 | 52.68% |
| | Democratic | Jay Nixon | 690,208 | 43.77% |
| | Libertarian | Tamara Millay | 31,876 | 2.02% |
| | Constitution | Curtis Frazier | 15,368 | 0.98% |
| | Reform | James Newport | 8,780 | 0.56% |
| Majority | Majority | Majority | 140,417 | 8.90% |
| Turnout | Turnout | Turnout | 1,576,857 | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Nevada

Incumbent Democrat Harry Reid won re-election to a third term.
Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | John Ensign | 105,263 | 80.57% |
| | Republican | Ralph W. Stephens | 13,679 | 10.47% |
| | Republican | None of these candidates | 11,704 | 8.96% |
| Total votes | Total votes | Total votes | 130,646 | 100.00% |
Reid won in a close election by 401 votes—even closer than Tim Johnson's Senate run in South Dakota in 2002, when he narrowly defeated Congressman John Thune by 524 votes. Ensign did not contest the results, and Reid won the race.
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Harry Reid (Incumbent) | 208,621 | 47.86% | −3.19% |
| | Republican | John Ensign | 208,220 | 47.77% | +7.56% |
| | Libertarian | Michael Cloud | 8,129 | 1.87% | +0.41% |
| | None of These Candidates | None of These Candidates | 8,113 | 1.86% | -0.79% |
| | Natural Law | Michael E. Williams | 2,781 | 0.64% | −0.83% |
| Majority | Majority | Majority | 401 | 0.09% | −10.74% |
| Turnout | Turnout | Turnout | 435,864 | | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## New Hampshire

Incumbent Republican Judd Gregg won re-election to his second term.
General election :
| Party | Party | Candidate | Votes | % |
| | Republican | Judd Gregg (Incumbent) | 213,477 | 67.8% |
| | Democratic | George Condodemetraky | 88,883 | 28.2% |
| | Libertarian | Brian Christeson | 7,603 | 2.4% |
| | Independent American | Roy Kendel | 4,733 | 1.5% |
| Majority | Majority | Majority | 124,594 | 39.6% |
| Turnout | Turnout | Turnout | 314,696 | 100.0% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## New York

Incumbent Republican Al D'Amato was running for re-election to a fourth term, but lost to Chuck Schumer in what was considered by many to be the "high[est] profile and nastiest" contest of the year.
Geraldine Ferraro, former U.S. Representative and nominee for Vice President in 1984, was well known for having been the 1984 Democratic vice presidential nominee and had also run but lost in the Democratic primary in the 1992 U.S. Senate election in New York. Mark Green, New York City Public Advocate, had been the Democratic nominee in the 1986 election, but lost in the general election to D'Amato.
At the start of 1998, Ferraro had done no fundraising, out of fear of conflict of interest with her job hosting the CNN program Crossfire, but was nonetheless perceived as the front-runner by virtue of her name recognition; indeed, December and January polls had her 25 percentage points ahead of Green in the race and even further ahead of Schumer. Unlike her previous campaigns, Ferraro's family finances never became an issue in 1998. However, she lost ground during the summer, with Schumer catching her in the polls by early August and then soon passing her. Schumer, a tireless fundraiser, outspent her by a five-to-one margin, and Ferraro failed to establish a political image current with the times. In the September 15, 1998, primary, she was beaten soundly by Schumer with a 51 percent to 26 percent margin. Unlike the bitter 1992 Democratic senatorial primary, this contest was not divisive, and Ferraro and third-place finisher Green endorsed Schumer at a unity breakfast the following day.
The primaries were held on September 15, 1998.
Democratic primary for the 1998 United States Senate election in New York :
| Party | Candidate | Votes | % |
| Democratic | Chuck Schumer | 388,701 | 50.84% |
| Democratic | Geraldine Ferraro | 201,625 | 26.37% |
| Democratic | Mark Green | 145,819 | 19.07% |
| Democratic | Eric Ruano-Melendez | 28,493 | 3.73% |
Independence Party primary for the 1998 United States Senate election in New York :
| Party | Party | Candidate | Votes | % |
| | Independence | Chuck Schumer | 2,562 | 58.04% |
| | Independence | Mark Green | 1,852 | 41.96% |
Right to Life Party primary for the 1998 United States Senate election in New York :
| Party | Party | Candidate | Votes | % | ±% |
| | Right to Life | Al D'Amato | 3,798 | 63.07% |
| | Right to Life | Thomas Drolesky | 2,224 | 36.93% |
During the general campaign, D'Amato attempted to brand Schumer as a diehard liberal, while Schumer accused D'Amato of being a liar. When D'Amato's first strategy failed, D'Amato attacked his opponent's attendance record as a member of Congress, which Schumer refuted.
Late in the campaign, D'Amato called Schumer a "putzhead" in a private meeting with Jewish supporters ("putz" is Yiddish for penis, and can be slang for "fool"). The senator later apologized.
In the last days of the campaign, D'Amato campaigned with popular Governor George Pataki, who was also running for re-election, and was also supported by New York City Mayor Rudy Giuliani and former Mayor Ed Koch (a Democrat) Vice President Al Gore and First Lady Hillary Clinton personally campaigned for Schumer, as D'Amato was a prominent critic of President Bill Clinton who led the investigation into Whitewater. Though the Republican party was well organized, the Democratic party benefited from robocalls from President Clinton and mobilization from two big unions, United Federation of Teachers and 1199.
Though D'Amato was effective in obtaining federal government funds for New York State projects during his Senate career, he failed to capitalize on this in the election. Also, Schumer was a tenacious fund-raiser and was aggressive in his attacks. The candidates spent $30 million during the race.
The race was not close with Schumer defeating the incumbent D'Amato by just over 10%. D'Amato did win a majority of New York's counties, but his wins were in less populated areas. Schumer's win is attributed to strong performance in New York City. Schumer also performed well in heavily populated upstate cities, like Buffalo, Syracuse, Rochester, and Albany.
1998 United States Senate election in New York :
| Party | Party | Candidate | Votes | % |
| | Democratic | Chuck Schumer | 2,386,314 | |
| | Independence | Chuck Schumer | 109,027 | |
| | Liberal | Chuck Schumer | 55,724 | |
| | Total | Chuck Schumer | 2,551,065 | 54.62% |
| | Republican | Al D'Amato | 1,680,203 | |
| | Conservative | Al D'Amato | 274,220 | |
| | Right to Life Party (New York) | Al D'Amato | 104,565 | |
| | Total | Al D'Amato (Incumbent) | 2,058,988 | 44.08% |
| | Marijuana Reform Party | Corinne Kurtz | 34,281 | 0.73% |
| | Green | Joel Kovel | 14,735 | 0.32% |
| | Libertarian | William McMillen | 8,223 | 0.18% |
| | Socialist Workers | Rose Ana Berbeo | 3,513 | 0.08% |
| Majority | Majority | Majority | | |
| Turnout | Turnout | Turnout | | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |
    Per New York State law, Schumer and D'Amato totals include minor party line votes: Independence Party and Liberal Party for Schumer, Right to Life Party for D'Amato.

## North Carolina

Incumbent Republican Lauch Faircloth decided to seek re-election to a second term, but was unseated by Democrat John Edwards.
In the Democratic primary, Edwards defeated D. G. Martin, Ella Scarborough, and several minor candidates. In the Republican primary, Faircloth easily defeated two minor candidates.
1998 North Carolina United States Senate election :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | John Edwards | 1,029,237 | 51.15% | |
| | Republican | Lauch Faircloth (Incumbent) | 945,943 | 47.01% | |
| | Libertarian | Barbara Howe | 36,963 | 1.84% | |
| Majority | Majority | Majority | 83,294 | 4.14% | |
| Turnout | Turnout | Turnout | 2,012,143 | | |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## North Dakota

Incumbent NPL–Democrat Byron Dorgan won re-election to a second term.
Republican Donna Nalewaja, State Senator's campaign focused on the suggestion that Dorgan had served in the United States Congress for nearly 20 years, and had accomplished relatively little. Dorgan and Nalewaja won the primary elections for their respective parties. McLain had previously run for North Dakota's other Senate seat in 1980 against Mark Andrews.
1998 United States Senate election, North Dakota :
| Party | Party | Candidate | Votes | % |
| | Democratic–NPL | Byron Dorgan (Incumbent) | 134,747 | 63.16% |
| | Republican | Donna Nalewaja | 75,013 | 35.16% |
| | Reform | Harley McLain | 3,598 | 1.69% |
| Majority | Majority | Majority | | |
| Turnout | Turnout | Turnout | 213,358 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Ohio

Incumbent Democratic U.S Senator John Glenn decided to retire, instead of seeking a fifth term. Republican Governor George Voinovich won the open seat.
General election :
| Party | Party | Candidate | Votes | % |
| | Republican | George V. Voinovich | 1,922,087 | 56.5% |
| | Democratic | Mary Boyle | 1,482,054 | 43.5% |
| Majority | Majority | Majority | 440,033 | 13.0% |
| Turnout | Turnout | Turnout | 3,404,141 | 100.0% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Oklahoma

Incumbent Republican Don Nickles won re-election to his fourth term.
OK U.S. Senate Election, 1998 :
| Party | Party | Candidate | Votes | % |
| | Republican | Don Nickles (Incumbent) | 570,682 | 66.4% |
| | Democratic | Don Carroll | 268,898 | 31.3% |
| | Independent | Mike Morris | 15,516 | 1.8% |
| | Independent | Argus W. Jr. Yandell | 4,617 | 0.4% |
| Majority | Majority | Majority | 301,784 | 35.1% |
| Turnout | Turnout | Turnout | 859,713 | 100.0% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Oregon

Incumbent Democratic Ron Wyden won re-election to his first full term, defeating Republican nominee John Lim, a state senator.
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Ron Wyden (Incumbent) | 682,425 | 61.05% | +13.27% |
| | Republican | John Lim | 377,739 | 33.79% | −12.47% |
| | Pacific Green | Karyn Moskowitz | 22,024 | 1.97% | +1.37% |
| | Libertarian | Jim Brewster | 18,221 | 1.63% | +0.32% |
| | Natural Law | Michael A. Campbell | 8,372 | 0.75% | +0.75% |
| | Socialist | Dean M. Braa | 7,553 | 0.68% | +.02% |
| | Write-In | Misc. | 1,413 | 0.13% | −1.12% |
| Majority | Majority | Majority | 304,686 | 27.26% | +25.74 |
| Turnout | Turnout | Turnout | 1,117,747 | | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Pennsylvania

Incumbent Republican Arlen Specter won re-election to a fourth term.
Leading up to this campaign, the state Democratic Party was in dire straits, as it was plagued by prior corruption allegations of several key legislators and by a lack of fund-raising. Just as in the accompanying gubernatorial race, the party had difficulty in finding a credible candidate. State Representative Bill Lloyd, State Representative, who was a well-respected party leader but who had almost zero statewide name recognition, was considered to be a sacrificial lamb candidate. Specter ran a straightforward campaign and attempted to avoid mistakes, while Lloyd's bid was so underfunded that he was unable to air a single commercial until two weeks before the election. Lloyd's strategy was to portray Republicans as hyper-partisan in wake of their attempt to impeach President Bill Clinton, but he was unable to gain any traction with his message. On Election Day, Specter's win was by the second-largest margin in the history of Senate elections in Pennsylvania. Lloyd won in two counties: almost uniformly Democratic Philadelphia and his home county, rural and typically Republican Somerset County.
General election :
| Party | Party | Candidate | Votes | % |
| | Republican | Arlen Specter (Incumbent) | 1,814,180 | 61.3% |
| | Democratic | Bill Lloyd | 1,028,839 | 34.8% |
| | Constitution | Dean Snyder | 68,377 | 2.3% |
| | Libertarian | Jack Iannantuono | 46,103 | 1.6% |
| Majority | Majority | Majority | 785,341 | 26.5% |
| Turnout | Turnout | Turnout | 2,957,499 | 100.0% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## South Carolina

Incumbent Democrat Fritz Hollings won re-election to his sixth full term. As of 2023, this is the last time Democrats won a U.S. Senate election in South Carolina.
South Carolina U.S. Senate Election Primary, 1998 :
| Party | Candidate | Votes | % |
| Republican | Bob Inglis | 115,029 | 74.6% |
| Republican | Stephen Brown | 33,530 | 21.7% |
| Republican | Elton Legrand | 5,634 | 3.7% |
The race between Hollings and Bob Inglis, U.S. Representative gave the voters a choice of two very different visions of and for South Carolina. Hollings was from the Lowcountry, a face of the Old New South, and secured a large amount of federal funds for the state. On the other hand, Inglis came from the Upstate, was a face of the New South, and opposed to pork barrel spending. Hollings viciously attacked Inglis on the campaign trail as a "goddamn skunk" and when Inglis requested that Hollings sign a pledge for campaign courtesy, Hollings replied that Inglis could "kiss his fanny." Inglis tried to tie Hollings to President Clinton, who had been tainted by the Lewinsky scandal.
Ultimately, Hollings won the race for four crucial reasons. First, Inglis refused to accept PAC donations which allowed Hollings to enjoy a huge financial advantage and blanket the state with his television advertisements. Secondly, Inglis came from the Upstate which already provided GOP majorities whereas Hollings came from the Lowcountry which was a key tossup region in the state. Thirdly, the voters two years prior in the 1996 Senate election had rewarded Strom Thurmond for his long service to the state and it was unlikely that they would then deny re-election to Hollings. Finally, the 1998 South Carolina GOP ticket was dragged down with unpopular Governor David Beasley at the top of the ticket who would go on to lose his re-election campaign to Jim Hodges.
South Carolina U.S. Senate Election, 1998 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Fritz Hollings (Incumbent) | 563,377 | 52.7% | +2.6% |
| | Republican | Bob Inglis | 488,238 | 45.7% | −1.2% |
| | Libertarian | Richard T. Quillian | 16,991 | 1.6% | −0.3% |
| | No party | Write-Ins | 457 | 0.0% | −0.1% |
| Majority | Majority | Majority | 75,139 | 7.0% | +3.8% |
| Turnout | Turnout | Turnout | 1,069,063 | 52.8% | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## South Dakota

Incumbent Democrat Tom Daschle won re-election to a third term. As of 2023, this was the last time the Democrats have won the Class 3 Senate Seat from South Dakota.
Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Ron Schmidt | 26,540 | 52.01% |
| | Republican | Alan Aker | 19,200 | 37.62% |
| | Republican | John M. Sanders | 5,292 | 10.37% |
| Total votes | Total votes | Total votes | 51,032 | 100.00% |
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Tom Daschle (Incumbent) | 162,884 | 62.14% | −2.76% |
| | Republican | Ron Schmidt | 95,431 | 36.41% | +3.90% |
| | Libertarian | Byron Dale | 3,796 | 1.45% | +0.15% |
| Majority | Majority | Majority | 67,453 | 25.73% | −6.66% |
| Turnout | Turnout | Turnout | 262,111 | | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Utah

Incumbent Republican Bob Bennett won re-election to a second term.
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Republican | Bob Bennett (Incumbent) | 316,652 | 63.98% | +8.60% |
| | Democratic | Scott Leckman | 163,172 | 32.97% | −6.74% |
| | Independent American | Gary Van Horn | 15,073 | 3.05% | |
| | Write-ins | | 12 | 0.00% | |
| Majority | Majority | Majority | 153,480 | 31.01% | +15.34% |
| Turnout | Turnout | Turnout | 494,909 | | |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## Vermont

Incumbent Democrat Patrick Leahy won re-election to a fifth term.
Notably, the Republican nominee, dairy farmer and actor Fred Tuttle, withdrew from the race and endorsed Leahy, asking Vermonters to vote for his Democratic opponent because he hated Washington DC and he was, as his wife had previously said publicly, unqualified to serve as a United States Senator. His campaign, which had been conducted primarily from his front porch in Tunbridge, VT, spent only $251 during the election season and featured the slogans "Spread Fred!" and "Why Not?" In spite of this, Tuttle still received 48,051 votes, or 22% of the total.
Democratic primary :
| Party | Party | Candidate | Votes | % |
| | Democratic | Patrick Leahy (Incumbent) | 18,643 | 96.65% |
| | Democratic | Write-ins | 647 | 3.35% |
| Total votes | Total votes | Total votes | 19,290 | 100.00% |
Grassroots Party primary :
| Party | Party | Candidate | Votes | % |
| | Grassroots | Bob Melamede | 137 | 59.57% |
| | Grassroots | Write-ins | 93 | 40.43% |
| Total votes | Total votes | Total votes | 230 | 100.00% |
Republican primary :
| Party | Party | Candidate | Votes | % |
| | Republican | Fred Tuttle | 28,355 | 53.69% |
| | Republican | Jack McMullen | 23,321 | 44.16% |
| | Republican | Write-ins | 1,137 | 2.15% |
| Total votes | Total votes | Total votes | 52,813 | 100.00% |
General election :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Patrick Leahy (Incumbent) | 154,567 | 72.22% | +18.05% |
| | Republican | Fred Tuttle | 48,051 | 22.45% | −20.90% |
| | Libertarian | Hugh Douglas | 4,199 | 1.96% | |
| | Independent | Barry Nelson | 2,893 | 1.35% | |
| | Grassroots | Robert Melamede | 2,459 | 1.15% | |
| | Liberty Union | Jerry Levy | 1,238 | 0.58% | −1.21% |
| | Write-ins | | 629 | 0.29% | |
| Majority | Majority | Majority | 106,516 | 49.77% | +38.95% |
| Turnout | Turnout | Turnout | 214,036 | | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Washington

Incumbent Democrat Patty Murray won re-election to a second term.
General election :
| Party | Party | Candidate | Votes | % |
| | Democratic | Patty Murray (Incumbent) | 1,103,184 | 58.4% |
| | Republican | Linda Smith | 785,377 | 41.6% |
| Total votes | Total votes | Total votes | 1,888,561 | 100.00% |
| Turnout | Turnout | Turnout | | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## Wisconsin

Incumbent Democrat Russ Feingold won re-election to a second term. In September 1997, Mark Neumann, a Republican U.S. Representative, announced his candidacy for the United States Senate against Russell Feingold. Both candidates had similar views on the budget surplus, although Neumann was for banning partial-birth abortion while Feingold was against a ban. Both candidates limited themselves to $3.8 million in campaign spending ($1 for every citizen of Wisconsin), although outside groups spent more than $2 million on Neumann; Feingold refused to have outside groups spend their own 'soft money' on his behalf. Feingold defeated Neumann by a slim 2% margin in the election. According to the Milwaukee Journal-Sentinel, Neumann had a 30,000 vote margin outside Milwaukee County, but was overwhelmed by a 68,000 vote margin in Milwaukee County.
General election results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Russ Feingold (Incumbent) | 890,059 | 50.55% |
| | Republican | Mark Neumann | 852,272 | 48.40% |
| | U.S. Taxpayers | Robert R. Raymond | 7,942 | 0.45% |
| | Libertarian | Tom Ender | 5,591 | 0.32% |
| | Independent | Eugene A. Hem | 4,266 | 0.24% |
| | | Write-in votes | 706 | 0.04% |
| Majority | Majority | Majority | 37,787 | 2.15% |
| Turnout | Turnout | Turnout | 1,760,836 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |