Few patterns in American politics are as reliable as this one: the party that holds the White House loses ground in the midterm election that follows.
The record
Since the end of World War II, the president’s party has lost House seats in every midterm election except two. Some of the largest swings in modern history came in midterms:
| Year | President | President’s party, House seats |
|---|---|---|
| 1994 | Bill Clinton (D) | Lost 54 |
| 2006 | George W. Bush (R) | Lost 30 |
| 2010 | Barack Obama (D) | Lost 63 |
| 2018 | Donald Trump (R) | Lost about 40 |
| 2022 | Joe Biden (D) | Lost 9 |
The losses often cost the president’s party control of the House. That happened in 1994, 2006, 2010 and 2018.
The two exceptions
1998. Democrats gained five House seats during Bill Clinton’s second midterm, held as Republicans were pursuing his impeachment. The strong economy and a backlash against the impeachment effort are the usual explanations. Speaker Newt Gingrich resigned days after the election.
2002. Republicans gained eight House seats in George W. Bush’s first midterm, held a little more than a year after the September 11 attacks, when Bush’s approval rating was still high.
Before World War II, Franklin Roosevelt’s Democrats also gained seats in 1934, during the early New Deal.
Why it happens
Political scientists have several explanations, and they likely all play a role:
- Turnout. Midterm electorates are smaller than presidential-year electorates. Voters who are unhappy with the president are often more motivated to show up than satisfied ones.
- Referendum effect. With no presidential candidate on the ballot, many voters treat the midterm as a verdict on the president’s performance, especially on the economy.
- Balancing. Some voters prefer divided government and vote to check the party in power.
- Regression to the mean. A president’s party often wins seats in marginal districts on the strength of the presidential race. Those seats are the hardest to hold two years later.
The Senate follows the pattern less consistently because only a third of seats are up each cycle, and which states happen to be on the ballot matters a great deal. In 2018, for example, Republicans lost the House but gained two Senate seats, largely because Democrats were defending seats in states Trump had won.
What it means for 2026
History doesn’t decide elections, but analysts lean on this pattern every two years. Even after mid-decade redistricting that was projected to help Republicans, most forecasts this year expect the president’s party to lose ground in the House. See our 2026 midterms guide for the current outlook.
Sources
- Office of the Clerk, U.S. House of Representatives, “Party Divisions of the House of Representatives, 1789 to Present” (history.house.gov)
- The American Presidency Project, UC Santa Barbara, “Seats in Congress Gained/Lost by the President’s Party in Mid-Term Elections” (presidency.ucsb.edu)
- U.S. Senate Historical Office, “Party Division” (senate.gov)