Trump’s Senate – President Donald Trump’s 53–47 Senate majority is coming under strain as four Republican senators have voted against the administration on major priorities. The defections are reshaping the math of what Trump can pass in the final two years before the midterms
President Donald Trump controls a 53–47 Republican Senate majority—but in recent weeks. the margins have started to feel like a cliff edge. Four Republican senators have broken with the administration on key issues. a shift that threatens Trump’s ability to pass his legislative priorities in the final two years before the midterms.
With a narrow three-seat edge, the Republican conference can’t afford much more than near-perfect unity. Even a small number of defections can force leaders to scale back—or abandon—parts of the president’s agenda.
The rebellion is already visible in votes tied to Iran war powers and funding fights inside the budget process. After Senator Bill Cassidy of Louisiana lost his primary on Saturday to a Trump-backed opponent. he quickly moved into a different posture—free from the pressure of electoral survival. By Tuesday. Cassidy voted to force a Senate debate on Trump’s Iran war alongside Senators Susan Collins of Maine and Lisa Murkowski of Alaska. That vote tipped the measure to a 50–47 majority. For Cassidy. the timing mattered: it would have been impossible just days earlier when he was still fighting for political survival.
Cassidy also announced opposition to a White House priority. telling reporters Tuesday that he would not support funding for a White House ballroom in the budget reconciliation bill. “I don’t expect to be voting for the ballroom funding. ” Cassidy said. criticizing the administration’s decision to set up what he called a “slush fund” to reward political allies. “People are concerned about making their own ends meet, not about putting a slush fund together without a legal precedent. We’re a nation of laws,” he said.
The defiance wasn’t happening in isolation. Collins, Murkowski, and North Carolina’s Thom Tillis have all voted against some of the administration’s key priorities, forming a loose set of Republicans willing to cross Trump when it counts.
Collins and Murkowski backed war powers resolutions limiting the president’s authority in Iran. Their break with Trump also showed up in how they responded to the president’s endorsement fight in Texas. When Trump endorsed Ken Paxton over Senator John Cornyn, Collins pushed back sharply, saying of Paxton, “I don’t understand. He is an ethically challenged individual,” and adding, “John Cornyn is an outstanding senator and merited the president’s support.”.
Tillis’s path to independence has been longer and more open. He announced last year he would not seek reelection, and after that pressure vanished, he began openly blocking Trump nominees and opposing administration priorities.
The consequences are mathematical as much as political. With a 53–47 majority, Trump needs near-perfect unity to pass major legislation. Four senators aligned with Trump’s agenda as a bloc—if they keep voting as they have—make major legislation mathematically impossible to pass if senators adhere to party lines. And the group could grow if more senators lose primaries and face no further electoral consequences.
Even so, the picture isn’t purely partisan. Some Democrats have sided with Trump’s second-term initiatives. Senators John Fetterman of Pennsylvania. Jeanne Shaheen and Maggie Hassan of New Hampshire. and Angus King of Maine — an independent who caucuses with Democrats—show the highest overall levels of Trump-voting alignment during his second stint in the Oval Office.
When the voting crosses aisles on standalone legislation and policy bills—excluding confirmations of administration officials—the most frequent alignment belongs to Fetterman, with Nevada’s moderate Senators Catherine Cortez Masto and Jacky Rosen following closely.
Against that backdrop, Trump’s broader Senate strategy is also on the move. The president endorsed Ken Paxton over John Cornyn in a runoff scheduled for May 26. and Cornyn immediately felt the cost of being “expendable” by Trump. “I’m really sad. I’m sad personally for John Cornyn and I hope he’s successful in his election regardless. and I’m sad for the institution. ” one unnamed GOP senator told The Hill. “There’s no senator that works harder to make things happen around here, works harder to take care of his colleagues.”.
Senate Majority Leader John Thune weighed in at the weekly GOP lunch Tuesday afternoon shortly after Trump announced support for Paxton. Asked about Trump’s social media post, Thune replied, “It’s his decision.”
Analysts warn that a Paxton victory could weaken the Republican ticket in the general election against Democrat James Talarico. Some recent polls show Talarico leading both Paxton and Cornyn in general-election matchups. For Trump, the calculation appears to be straightforward: back a MAGA loyalist in the primary.
That approach is colliding with weaker public support in Senate battleground states. Trump’s approval rating is described as tanking across several critical races. with Maine showing a negative 17-point approval. Michigan at negative 14. and even Texas—Trump’s 2024 win by 14 points—showing a negative 3-point approval rating.
Matt Klink, president of Klink Campaigns, warned that the dynamic carries real political risk for Republicans. “Six months out, public support is moving away from the party in power. If Republicans don’t change the story, the midterms could become a classic check-and-balance election,” Klink told Newsweek. “The danger for Republicans is that Trump’s approval becomes the emotional shortcut voters use to make decisions in races they otherwise haven’t fully engaged.”.
Maria Cardona. a political consultant based in Washington. D.C. said Republicans remain frozen by fear of crossing Trump. even as political costs mount. “It will be the question of the hour when the sun rises whether that has broken the chokehold. ” Cardona told Newsweek. “But you never know the kind of cult-like behavior they engage in. and whether they still believe Donald Trump can do political damage to them.”.
Trump’s midterm gamble, as described here, is built around the long game. He is betting on challengers like Paxton over incumbents like Cornyn. pushing MAGA-aligned candidates in competitive states and aiming to emerge with a stronger Republican majority. If Democrats win even a single seat Republicans were expected to hold, Trump’s majority would shrink further. But if his preferred candidates win in 2026. he could come out with a unified Senate majority—and replace the current fractured coalition with a bloc of Trump-aligned senators that consolidates control over his legislative agenda.
Donald Trump Senate majority GOP rebellion Bill Cassidy Susan Collins Lisa Murkowski Thom Tillis Iran war powers White House ballroom funding Ken Paxton John Cornyn James Talarico 2026 midterms