Table:
State | Incumbent | Party | Result | Candidates
Alabama | Lister Hill | Democratic | Re-elected | Lister Hill (Democratic) Unopposed
Arizona | Carl Hayden | Democratic | Re-elected | Carl Hayden (Democratic) 61.4% / Ross F. Jones (Republican) 38.6%
Arkansas | J. William Fulbright | Democratic | Re-elected | J. William Fulbright (Democratic) 83.0% / Ben C. Henley (Republican) 17.0%
California | Thomas H. Kuchel | Republican | Re-elected | Thomas H. Kuchel (Republican) 54.0% / Richard Richards (Democratic) 45.6% / Ray Gourley (Prohibition) 0.4%
Colorado | Eugene D. Millikin | Republican | Retired / Democratic gain | John A. Carroll (Democratic) 50.2% / Dan Thornton (Republican) 49.8%
Connecticut | Prescott S. Bush | Republican | Re-elected | Prescott S. Bush (Republican) 54.8% / Thomas J. Dodd (Democratic) 43.1%
Florida | George A. Smathers | Democratic | Re-elected | George A. Smathers (Democratic) Unopposed
Georgia | Walter F. George | Democratic | Retired / Democratic hold | Herman E. Talmadge (Democratic) Unopposed
Idaho | Herman Welker | Republican | Lost re-election / Democratic gain | Frank Church (Democratic) 56.2% / Herman Welker (Republican) 38.7%
Illinois | Everett M. Dirksen | Republican | Re-elected | Everett M. Dirksen (Republican) 54.1% / W. Richard Stengel (Democratic) 45.7%
Indiana | Homer E. Capehart | Republican | Re-elected | Homer E. Capehart (Republican) 55.2% / Claude R. Wickard (Democratic) 44.4%
Iowa | Bourke B. Hickenlooper | Republican | Re-elected | Bourke B. Hickenlooper (Republican) 53.9% / R. M. Evans (Democratic) 46.1%
Kansas | Frank Carlson | Republican | Re-elected | Frank Carlson (Republican) 57.9% / George Hart (Democratic) 40.5%
Kentucky | Earle C. Clements | Democratic | Lost re-election / Republican gain | Thruston Morton (Republican) 50.4% / Earle C. Clements (Democratic) 49.7%
Kentucky / Special: Class 2 | Robert Humphreys | Democratic | Appointee retired / Winner elected to finish term ending January 3, 1961 / Republican gain | John S. Cooper (Republican) 53.2% / Lawrence W. Wetherby (Democratic) 46.8%
Louisiana | Russell B. Long | Democratic | Re-elected | Russell B. Long (Democratic) Unopposed
Maryland | John M. Butler | Republican | Re-elected | John M. Butler (Republican) 53.0% / George P. Mahoney (Democratic) 47.0%
Missouri | Thomas C. Hennings, Jr. | Democratic | Re-elected | Thomas C. Hennings, Jr. (Democratic) 56.4% / Herbert Douglas (Republican) 43.6%
Nevada | Alan Bible | Democratic | Re-elected | Alan Bible (Democratic) 52.6% / Cliff Young (Republican) 47.4%
New Hampshire | Norris Cotton | Republican | Re-elected | Norris Cotton (Republican) 64.1% / Laurence M. Pickett (Democratic) 35.9%
New York | Herbert H. Lehman | Democratic | Retired / Republican gain | Jacob K. Javits (Republican) 53.3% / Robert F. Wagner, Jr. (Democratic) 46.7%
North Carolina | Sam J. Ervin, Jr. | Democratic | Re-elected | Sam J. Ervin, Jr. (Democratic) 66.6% / Joel A. Johnson (Republican) 33.4%
North Dakota | Milton R. Young | Republican | Re-elected | Milton R. Young (Republican) 63.6% / Quentin N. Burdick (Democratic) 36.0%
Ohio | George H. Bender | Republican | Lost re-election / Democratic gain | Frank J. Lausche (Democratic) 52.9% / George H. Bender (Republican) 47.1%
Oklahoma | A. S. Mike Monroney | Democratic | Re-elected | A. S. Mike Monroney (Democratic) 55.4% / Douglas McKeever (Republican) 44.7%
Oregon | Wayne Morse | Democratic | Re-elected | Wayne Morse (Democratic) 54.2% / Douglas McKay (Republican) 45.8%
Pennsylvania | James H. Duff | Republican | Lost re-election / Democratic gain | Joseph S. Clark (Democratic) 50.1% / James H. Duff (Republican) 49.7%
South Carolina | Olin B. Johnston | Democratic | Re-elected | Olin B. Johnston (Democratic) Unopposed
South Carolina / Special: Class 2 | Thomas A. Wofford | Democratic | Appointee retired / Winner elected to finish term ending January 3, 1961 / Democratic hold | Strom Thurmond (Democratic) Unopposed
South Dakota | Francis Case | Republican | Re-elected | Francis Case (Republican) 50.8% / Kenneth Holum (Democratic) 49.2%
Utah | Wallace F. Bennett | Republican | Re-elected | Wallace F. Bennett (Republican) 54.0% / Alonzo F. Hopkin (Democratic) 46.0%
Vermont | George D. Aiken | Republican | Re-elected | George D. Aiken (Republican) 66.4% / Bernard G. O'Shea (Democratic) 33.6%
Washington | Warren G. Magnuson | Democratic | Re-elected | Warren G. Magnuson (Democratic) 61.1% / Arthur B. Langlie (Republican) 38.9%
West Virginia / Special: Class 1 | William R. Laird, III | Democratic | Appointee retired / Winner elected to finish term ending January 3, 1959 / Republican gain | Chapman Revercomb (Republican) 53.7% / William C. Marland (Democratic) 46.3%
Wisconsin | Alexander Wiley | Republican | Re-elected | Alexander Wiley (Republican) 58.6% / Henry W. Maier (Democratic) 41.2%

Question: how many re-elected republicans had at least 53% of the vote?
Answer: 11

Question: how many states were listed as democratic?
Answer: 18

Question: at the top of the table, list the categories given.
Answer: State|Incumbent|Party|Result|Candidates

Question: counts and give the number of incumbents.
Answer: 35

Question: how many states had a democratic gain due to retirement?
Answer: 1