Senate Republicans are growing anxious about the midterms.

They once felt like they had a glidepath to keep or even grow their majority in November, unlike in the House, where GOP control is razor-thin and members have become increasingly on edge about Democrats returning to power.

But the mood is shifting, according to interviews with 10 GOP senators and aides, as the U.S. engages in open-ended war in the Middle East, rising oil prices threaten to slow the economy and President Donald Trump stokes intra-party divisions over an elections overhaul bill known as the SAVE America Act.

Some GOP senators are now openly predicting a tough battle to hold onto control as their party struggles to keep the focus on affordability policies that lawmakers want to make the centerpiece of their midterm campaign. The Senate passed a major housing bill this week but it faces an uncertain future in the House. Trump himself told Republican lawmakers Monday that housing is not a top concern for voters.

“I’m glad I’m not on the ballot,” Sen. Kevin Cramer (R-N.D.), a close Trump ally, said in an interview when asked how he was feeling about the November elections.

Republican senators are warning that the party writ large needs to hammer home cost-of-living measures — despite apparent disinterest and distractions from Trump, who they hope will lean into the housing bill fight. Recent polls have shown the Iran conflict and the resulting rise in prices are major worries for voters, even as the president downplays affordability concerns.

“Energy prices are high. Everything’s high,” said Sen. Josh Hawley (R-Mo.), another Trump ally. He added that Republicans should “take some votes to lower the costs.”

Democrats have to net four seats to win back control of the Senate — a tall order that still gives Republicans an inherent edge. But Republicans are playing defense in Maine and North Carolina, the two races widely viewed as the most likely flips, and they’re facing a messy Trump-fueled primary in Texas. Republicans view Michigan and Georgia as potential pick-ups, though Democrats think they’ve also been able to put states like Ohio and Alaska in play through strong candidate recruitment.

Asked about Trump’s claim that the party will be in trouble if it doesn’t pass the SAVE America Act, Senate Majority Leader John Thune told reporters this week that he believed the election is instead “going to be about the economy, and that’s why I think we’re focused on that.”

He also said that midterms are “always a little dicey” during the second term of a presidential administration.

But under pressure from Trump and a fervent base, Thune is teeing up what will likely be a multi-week debate on what the president calls his “No. 1 priority” — the SAVE America Act legislation that would institute tough new citizenship and photo ID requirements in order to cast a ballot. Trump wants to expand this legislation even further to prohibit gender-affirming surgery for children and restrict mail-in voting.

The bill lacks the votes for Senate passage, yet Thune and his conference are being lobbied hard by the right flank to revamp or eliminate the filibuster as a means of jamming the legislation through — a strategy that also doesn’t have the votes.

This intra-party tension is on full display in Texas, where Sen. John Cornyn is facing a May runoff against Texas Attorney General and MAGA favorite Ken Paxton. The elections bill has taken centerstage as Cornyn and Paxton vie for Trump’s endorsement, with Cornyn this week throwing his support behind scrapping the filibuster to pass the legislation.

Trump’s pressure campaign over the bill, including his decision to use the Texas race to make a play for its passage, has privately infuriated a broad swath of Senate Republicans, according to two people granted anonymity to speak candidly.

Republicans have privately conveyed to Trump that the voting measure can’t pass, while Thune has also publicly warned against linking a possible Cornyn endorsement to the bill.

Trump, however, told Fox News Radio Friday that he still intends to endorse in the race, but the “main thing I have to do is find out who’s going to get the SAVE America Act approved.” Senate Republicans are fearful that if Cornyn fails to win his runoff, the best-case scenario will cost the party hundreds of millions of dollars to defend against Democratic nominee James Talarico.

The election bill fight has spilled beyond Texas, as GOP senators are being flooded with public warnings from high-profile figures on the right that voters won’t turn out in the midterms or donate money unless the legislation passes. Trump has said passing the bill will “guarantee the midterms.”

White House spokesperson Olivia Wales said in a statement Friday that Trump “is the unequivocal leader of the Republican party, and he is committed to maintaining Republicans’ majority in Congress to continue delivering wins for the American people.”

“It’s clear that he has delivered for Americans with a secure border, cooling inflation, working-class tax cuts, new trade deals, new drug pricing deals and trillions in investments,” Wales added. “The White House is keen to tout these victories in the months ahead as we continue to work to Make America Great Again.”

In the meantime, recent polls show that it’s the unfolding Iran conflict and cost-of-living issues that voters care most about.

Just over half of voters oppose military action against Iran, compared to 40 percent who support it, according to a Quinnipiac University poll released this week. Nearly three-fourths said they were either very or somewhat concerned the war in the Middle East will lead to higher oil and gas prices.

In contrast, a Marist Poll also released this week found that 59 percent of Americans, when asked to consider November’s elections, said they wanted to ensure that everyone who wants to vote can do so — compared to 41 percent, who said their priority was making sure that no one who is ineligible can vote.

Sen. Ron Johnson (R-Wis.) said in an interview that he gives the president credit for making a “tough decision” on Iran but that “it’s not going to be necessarily good for the midterms.”

“Do I feel confident? I never feel confident,” he said. “It’s going to be a tough midterm.”

Sen. Shelley Moore Capito (R-W.Va.) when speaking to reporters this week urged patience on rising gasoline prices but acknowledged if they persist into the summer, “that’s always bad.”

Sen. Rand Paul (R-Ky.), one of the GOP conference’s louder Trump critics, was more blunt during a Fox News interview this week, saying it could be a “disastrous election” for the party if the war drags on. Trump announced Friday evening that the U.S. military had carried out a major bombing operation in an apparent attempt to pressure Iran into reopening the Strait of Hormuz, a waterway which carries roughly 20 percent of the world’s oil.

Retiring Sen. Thom Tillis (R-N.C.), whose state is very much in play with his exit, said he’s seeing parallels to 2018, when Democrats won the House amid deep dissatisfaction with Republican leaders on Capitol Hill and in the Trump White House.

Tillis, who frequently vocalizes the concerns many of his colleagues express privately, said some Republicans have asked him, “‘why are you saying this out loud?’”

“Democrats are going to … take advantage of the increase in energy and drive the affordability message and we’ve got to have an answer for affordability,” he explained.

“We’ve just got to be realistic about it,” Tillis added. “We’ve got a voter enthusiasm gap that we need to address.”