World

President’s Party Loses House Seats in 18 of 20 Midterms Since 1946

By Alia Chughtai

On Tuesday, voters head to the polls for the United States midterm elections, which take place halfway through a president’s four‑year term. The election will decide all 435 seats in the House of Representatives and 35 of the 100 Senate seats, determining which party controls Congress for the next two years. Although the president’s name does not appear on the ballot, the vote is widely viewed as a verdict on the presidency, and the president’s party almost always pays the price.

From 1946 to 2022, 18 of the 20 midterms saw the president’s party lose House seats. The average loss was 26 seats. Only Bill Clinton’s Democrats in 1998 and George W. Bush’s Republicans in 2002 bucked the trend. Political scientists refer to this pattern as the “presidential penalty” or the “midterm penalty.” The president’s party tends to lose seats simply because it holds power, and voters use the midterms to check the White House.

In the House, Democratic presidents have suffered the biggest midterm defeats since 1946. On average, their party has lost about 29 seats in a midterm, compared with about 23 under Republican presidents. The largest loss occurred in 2010, when Democrats lost 64 seats and Republicans took control of the chamber. The Democrats under Truman lost 56 seats in 1946, and under Clinton, they lost 54 in 1994, each time losing control of the House. The worst Republican defeats came under Dwight D. Eisenhower, who lost 50 seats in 1958, and Gerald Ford, who lost 48 in 1974. Donald Trump’s first midterm in 2018 cost Republicans 42 seats and control of the House. In seven of the 20 midterms since 1946—1946, 1954, 1994, 2006, 2010, 2018 and 2022—the House changed hands.

In the Senate, the president’s party has lost seats in 13 of the 20 midterms since 1946 but lost control of the chamber in only six: 1946, 1954, 1986, 1994, 2006 and 2014. Because only about a third of the Senate’s 100 seats are contested each cycle, the specific states voting can be as important as the national mood. Eisenhower’s Republicans suffered the biggest Senate loss in the period, giving up 13 seats in 1958. Truman’s Democrats lost 12 in 1946, and Obama’s Democrats lost nine in 2014, handing control of the chamber to Republicans.

At times, the two chambers have moved in opposite directions. In 1982, Ronald Reagan’s Republicans lost 26 House seats but gained one in the Senate. In 2018, Trump’s Republicans lost the House but added a Senate seat, and in 2022, Biden’s Democrats lost the House while gaining one seat in the Senate. These split results show that a backlash against the president does not land evenly across Congress.

Losing seats and losing control are not the same thing. For example, Lyndon Johnson’s Democrats lost 47 House seats in 1966 but kept their majority. Twenty years later, Reagan’s Republicans lost only four House seats but lost the Senate after an eight‑seat setback. Control of the chambers determines who sets the agenda and passes legislation. A bill must pass both chambers before it reaches the president for approval or veto, so an opposition majority in either can block the president’s plans. A House majority can also allow a party to launch investigations and impeach a president, while a Senate majority can reject the president’s nominees, including federal judges who serve for life.

This year, Democrats need to gain three seats to win the House and four to win the Senate. A 50‑50 split in the Senate would leave Republicans in control because Vice President JD Vance may cast tie‑breaking votes.