As the 2026 midterm elections loom on the horizon, a significant internal rift within the Republican Party is threatening its control of the United States Senate. Senior figures, including Majority Leader John Thune, are facing an uphill battle to retain their narrow majority, a struggle compounded by former President Donald Trump's deliberate political manoeuvring.
The Endorsement Freeze: A Calculated Snub
According to a report from Politico published this week, Donald Trump currently has no plans to endorse three incumbent Republican senators seeking re-election in November. The senators in question are Susan Collins of Maine, Bill Cassidy of Louisiana, and John Cornyn of Texas. This decision, relayed by sources familiar with Trump's thinking, sends a stark message of disapproval and could have severe electoral consequences.
For Senators Collins and Cornyn, the lack of a presidential endorsement is particularly problematic. Collins, though often seen as a maverick in a state with an independent streak, could face a tougher race without the unified support of her party's base. The situation is more dire for John Cornyn in Texas, where he is battling primary challenges from the right, most notably from state Attorney General Ken Paxton, who is currently leading in some polls.
Paxton positions himself as a staunch MAGA-aligned alternative to Cornyn's more traditional conservative style. While Cornyn's allies argue Paxton's controversial record would make him unelectable in a general election, the withholding of Trump's endorsement weakens the incumbent's position with the party's core voters.
A Widening Path for Democratic Hopes
This internal Republican discord is providing a substantial boost to Democratic ambitions. The party needs a net gain of four seats while successfully defending all of their own to reclaim the Senate majority. Trump's actions are making that goal appear increasingly attainable.
Democratic confidence has been further buoyed by successful candidate recruitment. The entrance of former Representative Mary Peltola into the Alaska Senate race against Republican Dan Sullivan has thrown that traditionally red state into potential play. Senate Democrats' campaign chief, Kirsten Gillibrand, has expressed bullish optimism about her party's chances, a sentiment echoed by Minority Leader Chuck Schumer who recently described the path to a majority as "much wider than it was three months ago."
Retirements and Feuds Compound GOP Woes
The endorsement issue is not the only headache Trump has created for congressional Republicans this election cycle. A wave of retirements, which senior party members privately blame on the White House's domineering influence, is depleting the GOP's experienced ranks.
A telling example is the feud last year between Trump and Senator Thom Tillis of North Carolina. After breaking with the president on a major legislative bill, Tillis was swiftly attacked by Trump and subsequently announced he would not seek re-election. Democrats are now favoured to win his seat, with popular former governor Roy Cooper as their candidate.
The potential loss of the Senate would have profound implications for Donald Trump's presidency. It would leave his administration exposed to a potential twin Democratic majority in Congress, an outcome he has warned supporters would lead to a third impeachment attempt. More practically, it would halt any further legislative progress on his agenda and likely unleash a torrent of congressional investigations into the controversies of his second term.
For Republican leaders in Washington, the task of maintaining Senate control has become a delicate balancing act between managing a restless base loyal to Trump and appealing to the broader electorate—a challenge that grows more difficult by the day.
