Republican senators express anger as President Trump actively opposes some of their colleagues in primary races. The president’s actions have resulted in some Republicans willing to defy him in Congress.

After losing his primary to a Trump-backed challenger, Senator Bill Cassidy from Louisiana sided with Democrats to support limiting the war in Iran.

Credit: Kenny Holston/The New York Times

Republican Sentiment

On May 20, 2026, Republican senators are frustrated after President Trump intervened in primaries, resulting in one incumbent losing his seat and another being at risk. They claim Trump places revenge above governance.

As they approach a critical midterm election that could affect their Senate majority, Republican senators face challenges due to a growing number of restless lame-duck members. The sense is that Trump prioritizes political maneuvers over legislative successes that could benefit them in the election.

Impact on Political Climate

The political atmosphere has worsened as Trump pursues military action in Iran, affecting gas prices, and imposes tariffs that raise costs for businesses and consumers. Despite these issues, he expects lawmakers to remain loyal, even if distancing from him might help their political future.

Senator Lisa Murkowski of Alaska described the mood as “sour” after Trump decided against supporting Senator John Cornyn from Texas, a former party leader, endorsing his opponent instead. Murkowski, who has previously opposed Trump, pointed out that both Cornyn and the defeated Cassidy remain senators until January 3. This situation compels the Trump administration to deal with the current Senate, rather than the one he envisions.