Senate Majority Leader John Thune (R-S.D.) is facing intensified pressure from President Trump's allies after Sen. John Cornyn (R-Texas) suffered a landslide defeat in the Texas GOP primary. Republican strategists say Cornyn's loss—by 27 points to state Attorney General Ken Paxton—is a stark warning to Senate Republicans who invested heavily in the incumbent's campaign.
The outcome has emboldened Trump's MAGA faction, which sees the primary result as proof of the president's iron grip on the party base. Thune now must navigate demands to push through Trump's legislative priorities, including the Safeguard American Voter Eligibility (SAVE America) Act and funding for the White House ballroom.
“If they can’t get the SAVE Act through, what’s the point of having the seat?” asked Ford O’Connell, a Trump-aligned Republican strategist. He argued that Trump's influence in Texas will force Senate Republicans to revisit the bill, which faces near-unanimous Democratic opposition and would need 60 votes to pass unless rules are changed.
O’Connell noted that Trump has called for eliminating the filibuster or firing the Senate parliamentarian to advance his agenda. “This is the White House’s thinking: If the Democrats get back in—they’ve already said what they want to do—they want to pack the Supreme Court, they’re going to get rid of the filibuster, they want to change the Electoral College, they want to make D.C. and Puerto Rico states.”
He added that Senate Republicans “have to reconsider the fact that Donald J. Trump is the head of the Republican Party, the base will go anywhere with him, and anyone who interferes or obstructs the America First agenda will likely pay a political price.”
Trump is reportedly displeased that Senate Republicans spent tens of millions to defeat Paxton, only to now back him against Democrat James Talarico in the general election. On “The Hugh Hewitt Show,” Thune pledged the party would go “all in” for Paxton. “We’ve got to pivot and go all in to make sure that we keep Texas red, that he wins, and that we keep a far left liberal out of the United States Senate,” Thune said.
Senate GOP leaders had viewed Paxton as a weak general election candidate, which drove their spending to prop up Cornyn. Ron Bonjean, a Republican strategist and former Senate aide, cautioned that Trump cannot claim full victory unless Paxton wins in November. “Paxton has to win, and Senate Republicans are going to work on getting him across the finish line, and it’s likely going to take everything to make that happen, from fundraising to joint appearances,” Bonjean said.
He acknowledged that a Paxton victory would signal “the MAGA forces … growing within the Senate.” Cornyn’s loss, he added, shows “Trump has solid control over Republican primary voters and if you cross him at all, and he endorses another candidate, that candidate is likely to win.” Similar dynamics played out in Louisiana and Kentucky, where Trump-backed challengers defeated incumbents Sen. Bill Cassidy and Rep. Thomas Massie.
The Texas result is pressuring Senate Republicans to reconsider their opposition to funding the White House ballroom and a nearly $1.8 billion “anti-weaponization” fund proposed by the Justice Department. Last week, GOP senators planned to strip ballroom funding from a budget reconciliation package and criticized acting Attorney General Todd Blanche over the fund. The package stalled after Republicans refused to fend off Democratic amendments attacking the fund.
Strategists say Thune must now find a way to smooth over internal divisions and redouble efforts on the SAVE Act, along with $72 billion for immigration enforcement. Brian Darling, a GOP strategist and former Senate aide, called Paxton's win “lopsided” and noted that Cornyn’s camp spent $92 million—far more than Paxton’s supporters. “Having an incumbent who’s in leadership losing by this amount, I think Trump had a big impact,” Darling said.
As the general election approaches, Hispanic voters could prove decisive in the Texas Senate race, and Democrats see an opening with Paxton's controversial record. Thune's ability to unite the conference behind Trump's agenda—and Paxton's candidacy—will test his leadership in the months ahead.
