U.S. Senate

Republicans gained control of the Senate with 53 seats to Democrats' 47.

Republicans took Senate control in 2024 elections.

Democrats gained one seat in midterm elections, increasing their majority to 51-49.

Unusual for the party in power to gain seats in midterms.

Democrats gained three seats, taking control of Senate with 50 seats plus Vice President tiebreaker.

Georgia runoff elections in January 2021 determined final control.

Republicans gained two seats despite House losses, holding Senate with 53 seats.

Strong Republican performance in midterm Senate elections.

Republicans lost two seats but maintained control with 52-48 majority.

Republicans maintained Senate majority despite losing seats.

Republicans gained nine seats, taking Senate control with 54 seats.

Significant Republican wave election.

Democrats gained two seats, holding 55-45 majority.

Democrats benefited from presidential election turnout.

Republicans gained six seats in midterm elections.

Democratic Senate majority reduced to 53-47.

Democrats gained eight seats, expanding majority to 58-42.

Democrats benefited from strong presidential year and Democratic gains.

Democrats gained six seats and took Senate control with 51-49.

Major Democratic wave in midterm elections.

Republicans gained four seats, expanding majority to 55-45.

Republicans strengthened control in presidential election year.

Republicans gained two seats, holding 51-49 majority.

Rare midterm performance for party in power.

Senate remained evenly split at 50-50.

Vice President cast tie-breaking votes.

Democrats gained four seats in midterm elections.

Unusual Democratic gains during second presidential term.

Republicans maintained 55-45 majority in presidential election year.

Republicans held Senate control during Clinton reelection.

Republicans gained eight seats in major midterm wave, taking 53-47 control.

Part of Contract with America wave election.

Senate composition remained split as incumbents largely retained seats.

Year of the Woman saw increased female candidates.

Republicans gained one seat as Democrats held 57-43 majority.

Relatively stable Senate election.

Democrats maintained 55-45 majority in presidential election year.

Democrats held Senate control despite Bush presidential victory.

Democrats gained eight seats and took control with 55-45 majority.

Major Democratic midterm gain.

Republicans gained two seats and held 53-47 majority.

Republican strength in Reagan presidency.

Republicans maintained 54-46 majority despite losing one seat.

Republicans held Senate control during recession midterms.

Republicans gained 12 seats and took control with 53-47 majority.

Reagan Revolution included major Senate gains.

Republicans gained 3 seats but Democrats held 59-41 majority.

Democrats maintained strong Senate control.

Democrats gained one seat with 61-38 majority plus one Independent.

Post-Watergate Democratic wave.

Democrats gained four seats post-Watergate with 60-37 majority plus Independents.

Watergate scandal drove Democratic gains.

Democrats maintained control with 56-42 majority.

Democrats held Senate despite Nixon presidential landslide.

Republicans gained two seats but Democrats held 54-44 majority.

Midterm elections during Vietnam War era.

Republicans gained four seats with 42-57 majority going to Democrats.

Nixon victory paralleled Republican Senate gains.

Republicans gained three seats in midterm with 46-54 minority.

Midterm correction following 1964 Democratic wave.

Democrats gained two seats with 68-32 supermajority.

Johnson landslide provided strong Democratic Senate.

Democrats gained one seat with 64-36 majority.

Unusual Democratic gains in midterm.

Democrats gained one seat with 65-35 majority.

Kennedy victory accompanied Democratic Senate dominance.

Democrats gained 13 seats in major midterm wave.

Significant Democratic advantage entering 1960s.

Democrats gained one seat but Republicans held as Democrats took majority.

Eisenhower reelection did not help Republican Senate.

Democrats gained two seats and took Senate control with 48-47 majority.

Midterm correction reversed Republican 1952 gains.

Republicans gained one seat with 48-47 majority.

Eisenhower victory included Republican Senate gains.

Republicans gained five seats but Democrats held 49-47 majority.

Midterm elections amid Korean War.

Democrats gained three seats and took 54-42 majority.

Truman upset victory accompanied Democratic Senate gains.

Republicans gained 12 seats and took Senate control with 51-45 majority.

Major Republican wave post-World War II.

Democrats held majority as wartime stability prevailed.

Wartime election maintained Democratic control.

Republicans gained nine seats during World War II midterm.

Midterm correction but Democrats retained control.

Democrats held strong 66-23 majority with third Roosevelt term.

FDR reelection maintained Democratic dominance.

Republicans gained six seats in major midterm wave.

First significant Republican recovery since 1932.

Democrats gained eight seats with overwhelming 75-17 supermajority.

FDR landslide included massive Senate Democratic gains.

Democrats gained nine seats and took 69-25 majority.

Unusual Democratic gains during Depression recovery.

Democrats gained 12 seats and took control with 60-35 majority.

FDR victory created major Democratic Senate wave.

Republicans lost eight seats but held narrow 48-47 majority.

Midterm loss during Great Depression early stages.

Republicans gained six seats with 56-39 majority.

Hoover victory included Republican Senate gains.

Republicans held majority during Coolidge administration.

Stable Republican control in 1920s.

Republicans held strong 51-43 majority.

Coolidge election maintained Republican dominance.

Republicans lost seats in midterm elections but maintained 51-43 majority.

Republicans lost about 8 seats in midterm elections.

Republicans gained 10 seats and took Senate control with 59-37 majority.

Harding victory began Republican 1920s dominance.