Primary season has officially concluded in the United States. President Donald Trump successfully ousted several Republican incumbents while candidates with ties to the Democratic Socialists of America (DSA) unseated multiple Democratic House members.

The midterm elections are scheduled for 3 November, leaving control of the House of Representatives still very much up for grabs. Before a single general-election vote has been tallied, 74 House members are already heading out the door, representing more departures than before any general election since 1992.

This wave of exits includes 13 outgoing House members who advanced through primaries for governorships, the Senate, or other offices. Another 15 outgoing House members were rejected by voters in primaries for other offices, while 11 representatives seeking re-election to the House lost their primaries directly.

Seven of the 11 House incumbents who lost primaries were Democrats. Among those departing were Democrats Julie Johnson and Al Green, who were unseated by other Democratic incumbents after being redistricted by Texas Republicans. John Larson also lost the Democratic primary to challenger Luke Bronin.

In Maryland, Adrian Boafo won the primary to replace veteran House Democrat Steny Hoyer. Hawaii congressman Ed Case defeated state senator Jarrett Keohokalole in the Democratic primary, while moderate congresswoman Marie Gluesenkamp Perez won the Democratic nomination in Washington against several challengers.

Four of the five House Democrats who lost primaries to newcomers were defeated by candidates with ties to the Democratic Socialists of America (DSA). In New York, DSA member Darializa Avila Chevalier defeated Congressional Hispanic Caucus chair Adriano Espaillat in the Democratic primary. Former DSA member Brad Lander also defeated congressman Dan Goldman in New York, while DSA member Claire Valdez won the Democratic primary to replace retiring congresswoman Nydia Velazquez.

The trend extended beyond New York, as DSA member Melat Kiros unseated 30-year incumbent Diana DeGette in the Colorado Democratic primary. In Michigan, DSA-endorsed Donovan McKinney beat congressman Shri Thanedar in the Democratic primary. DSA-endorsed Chris Rabb won the Democratic primary for the House in Philadelphia.

"A lot of people were hoping that it was a blip, like oh well, this is a special case. We showed them a different way. So I think all of those things make this election cycle uniquely powerful in ways that most people could not anticipate, myself included." Rabb said. Many left-wing candidates who ousted Democratic House incumbents attacked the incumbents' ties to Aipac, even as surveys show that some Republicans and many Democrats hold negative views of Israel.

Not all progressive challenges succeeded, as DSA member Cori Bush lost her primary challenge against congressman Wesley Bell in Missouri. Bell had previously unseated Bush two years prior to this primary. In Massachusetts, Democratic senator Ed Markey won renomination against challenger Seth Moulton, and in Colorado, state senator Julie Gonzales lost her left-wing challenge to Democratic US senator John Hickenlooper in the primary.

On the Republican side, President Trump campaigned against Kentucky congressman Thomas Massie in the primary. Massie lost his primary to Ed Gallrein. Trump did not endorse Texas representative Dan Crenshaw in his primary, and Crenshaw subsequently lost the Republican nomination.

Trump successfully ousted Louisiana senator Bill Cassidy in the primary, two years after Cassidy voted to convict Trump after January 6. Trump also successfully ousted Texas senator John Cornyn in the primary. Nearly 97% of the candidates Trump backed in congressional and gubernatorial races won their primaries.

Despite this high success rate, five gubernatorial candidates won their primaries without Trump’s endorsement. Four House aspirants also won their primaries without Trump’s endorsement. In Michigan, former DSA member William Lawrence won the Democratic nomination to challenge Republican incumbent Tom Barrett in a swing congressional district. Abdul El-Sayed defeated congresswoman Haley Stevens, who was backed by much of the party establishment, in the Michigan Democratic Senate primary.

The Cook Political Report considers 21 House districts to be toss-ups. Nominees in the 21 toss-up House districts are almost entirely backed by PACs of either the center-left New Democrat Coalition or the moderate Blue Dogs. Recent polls show Democratic nominee James Talarico with a slight lead over Ken Paxton, who is Trump’s preferred candidate.

Why It Matters

The scale of the turnover suggests a realignment within both parties, with established figures losing ground to outsiders endorsed by influential movements or specific leaders. The departure of 74 members creates a historic level of uncertainty for the upcoming legislative session, as new representatives will enter Congress with different priorities and alliances than their predecessors.

Centrist Democrat group Third Way launched a $US15 million ($21 million) campaign to discredit democratic socialism within the party. "If Democrats are to win the majority in the House and/or the Senate, it will be because moderates flip seats from red to blue," said Matt Bennett, executive vice-president at Third Way. The primary results demonstrate a powerful, unanticipated shift in the political landscape that challenges established party norms.

What's New

Additional reporting confirms that Trump is President of the United States (2017–2021; since 2025). This context clarifies the extent of his influence over the recent primary outcomes, as his active campaigning and endorsements played a decisive role in numerous Republican contests.

This financial commitment reflects the strategic response from moderate factions to the gains made by DSA-aligned candidates during the primary season.