President Donald Trump is becoming an increasingly important factor in the 2026 U.S. midterm elections, with Republicans facing growing concerns that dissatisfaction with the president could threaten their congressional majorities.

GOP Faces Tougher Election Landscape

With the midterm campaign entering its final stretch, Democrats are showing stronger voter enthusiasm and leading in several key political indicators. Republicans currently hold narrow majorities in Congress, making relatively small shifts in competitive districts potentially decisive.

Trump's political standing has become a central issue. Concerns over the economy, inflation and the war in Iran are creating challenges for Republican candidates who must balance support for the president with their own campaigns.

The Republican Party is also preparing for its first midterm convention, with Trump expected to headline the event in Dallas. The gathering is intended to energize the GOP base and strengthen party unity ahead of November.

Congressional Control at Stake

The battle for the Senate is particularly competitive. Reuters identifies nine key Senate races that could determine which party controls the chamber, including contests in North Carolina, Georgia, Michigan, Texas, Ohio and Maine.

Democrats are also targeting the House, where a relatively small number of seats could determine control of Congress.

Republicans are hoping Trump's political organization, campaign spending and ability to mobilize his core supporters will help protect vulnerable candidates.

The 2026 midterms are increasingly shaping up as a major test of Trump's influence over the Republican Party and his ability to turn presidential support into congressional victories.