WASHINGTON (AP) — Defense Secretary Pete Hegseth will face a new round of questioning from lawmakers over the Iran war Tuesday, including some Republicans who have expressed concerns over the length of the conflict and its lack of congressional approval.

The powerful House and Senate subcommittees that oversee defense spending are holding back-to-back hearings to review the Trump administration’s 2027 military budget proposal, which calls for a historic allocation of $1.5 trillion. But the discussions are expected to veer into the handling of a war that appears locked in a stalemate as higher fuel prices pose political problems for Republicans in the midterm congressional elections.

President Donald Trump is facing increasing pressure from the economic shocks of Iran effectively closing the Strait of Hormuz, a vital shipping corridor where 20% of the world’s oil normally flows. The U.S. military in turn has blockaded Iranian ports and the two sides have traded fire, with American forces thwarting attacks on their warships and disabling Tehran-linked oil tankers.

Trump said Monday that the ceasefire is on “massive life support” and criticized Iran for its latest proposal, pointing to his demands that Iran significantly limit its nuclear program.

“I would call it the weakest right now after reading that piece of garbage they sent us,” Trump said.

The Republican president also said he wanted to suspend the federal gas tax to help Americans shoulder surging fuel prices. He has previously said higher costs are worth it to prevent Iran from getting a nuclear weapon.

Tuesday’s hearings will give a mostly new group of lawmakers the chance to grill or applaud Hegseth and Gen. Dan Caine, chair of the Joint Chiefs of Staff, on the planning and execution of the war.

That includes Sen. Susan Collins of Maine, a Republican whose reelection this year is far from guaranteed. She voted with Democrats on an effort to halt the conflict late last month, saying she wants to see a defined strategy for bringing the war to a close.

Alaska Sen. Lisa Murkowski, another Republican on the Senate Appropriations defense subcommittee, has voted against the string of unsuccessful war powers resolutions but spoken of the need for congressional authorization so Americans will know the war’s limits and objectives.

Hegseth and Caine had faced marathon hearings two weeks ago before the House and Senate Armed Services committees, which mostly traced the well-worn positions of both parties.

In the previous hearings, Hegseth notably said the ceasefire paused a 60-day deadline for congressional approval of the war, which is required under the 1973 War Powers Act. The U.S. and Israel launched the war on Feb. 28, while the fragile truce began April 8.

Hegseth’s reasoning faced pushback from Democrats and will likely encounter similar criticism Tuesday. But he will face plenty of friendly Republicans, including the Senate subcommittee’s chair, Sen. Mitch McConnell of Kentucky, and perhaps the Iran war’s biggest booster in Congress, Sen. Lindsey Graham of South Carolina.

Hegseth and Caine are expected to outline the proposed defense budget and stress the need for more drones, warships and missile defense systems whose stocks have been drawn down during the conflict.

Ben Finley, The Associated Press