Defense Secretary Pete Hegseth spent Tuesday fielding pointed questions from members of his own party across two back-to-back Appropriations subcommittee hearings, as Republican lawmakers voiced open concern about how the Pentagon plans to fund the war in Iran, whether the administration's budget math adds up, and whether the White House has the legal authority to keep fighting without a congressional vote.
The hearings, one in the House, one in the Senate, covered a wide arc: a $1.5 trillion defense budget request split awkwardly between regular appropriations and reconciliation, a war cost estimate that jumped $4 billion in less than a month, a still-closed Strait of Hormuz, classified battle-damage numbers the Pentagon refused to share in open session, and the growing presence of Russian warships in Cuban ports.
What made the day unusual was not the Democrats' predictable opposition. It was the tone from Republicans. Chairmen and senior members of the majority party used their own gavels to challenge the administration's strategy, its fiscal footing, and its transparency, a sign that the Iran conflict, now in its eleventh week, is testing the patience of even the president's allies on Capitol Hill.
President Trump's Pentagon budget request seeks roughly $1.1 trillion through the normal appropriations process and another $350 billion through a party-line reconciliation bill. That split drew immediate skepticism from Republicans who control the spending committees, as The Hill reported.
Rep. Ken Calvert, the California Republican who chairs the House Appropriations Subcommittee on Defense, said "questions persist" and expressed "serious concerns" about the approach.
"The subcommittee needs to understand how the resources requested in this budget translate into real, measurable improvements in warfighting capability."
House Appropriations Committee Chair Tom Cole, an Oklahoma Republican, framed the problem in blunter terms. He said he had no issue with the total dollar figure, the concern was structural.
"I don't have any concerns about the amount.... I am worried about the ability to sustain that number through the reconciliation process. At some point the money disappears."
On the Senate side, Mitch McConnell, now chairing the Senate Appropriations Defense Subcommittee, delivered the sharpest institutional warning. McConnell objected to leaving major programs, including the "Golden Dome" missile defense system, munitions production, the F-35 fighter jet, and drone production outside the regular appropriations process.
"Political realities will not always allow a party-line budget reconciliation, and if the department's top priorities aren't built into annual appropriations, we're actually taking a big risk. These key lines of effort only work if we put them on solid fiscal footing."
Hegseth acknowledged the constraints. He told lawmakers there is "a reality in this town of what can get done and how it gets done," adding that "in a perfect world everything would get done in regular order and with a $1.5 trillion top line, but there are a lot of challenges and dynamics, some of which I don't control."
That candor is worth noting. The defense secretary is not pretending the budget structure is ideal. The question is whether Congress, especially the Senate, where reconciliation requires near-unanimous Republican support, will accept a plan that parks hundreds of billions in defense spending on a legislative vehicle that may not survive contact with political reality. McConnell's record suggests he won't stay quiet about it.
The Pentagon's acting chief financial officer, Jules Hurst III, told lawmakers the estimated cost of the Iran war has risen from $25 billion, the figure cited in House testimony on April 29, to roughly $29 billion. The $4 billion jump came in less than a month.
"So at the time of testimony from the ask, it was $25 billion, but the joint staff team and the comptroller team are constantly looking at that estimate, and so now we think it's closer to $29 [billion]. That's because of updated repair and replacement of equipment costs and also just general operational costs keep people in theater."
Hurst added a caveat that hinted at even more uncertainty: the $29 billion figure did not include the cost to repair damaged air bases and other U.S. outposts in the region. He said he was "most confident" in the Pentagon's projections on munitions costs, "that's the easiest thing to calculate", and suggested one number cited in questioning "sounds a little high to me for that state of the war."
Rep. Ed Case, a Hawaii Democrat, pressed Hurst on an April 21 analysis from the Center for Strategic and International Studies regarding key U.S. munitions used in the conflict. The exchange underscored a growing worry in both parties: that eleven weeks of sustained operations against Iran are consuming stockpiles at a rate the defense industrial base may struggle to replace. Hegseth has previously clashed with Sen. Mark Kelly over weapons stockpile concerns, a dispute that has spilled into questions about classified briefings.
Sen. Susan Collins, a Maine Republican, pressed Hegseth on the administration's approach to the Strait of Hormuz, which remains closed. Collins told the defense secretary that "it seems there has been a different plan almost daily with dealing with this problem."
Hegseth said the administration would "ultimately" address the closure but offered no timeline. Sen. Chris Coons, a Delaware Democrat, asked the obvious follow-up: "If we control it, how do we reopen it?"
The exchange exposed a gap between the administration's claims of battlefield progress and the visible reality of a major global shipping lane still shut down. Hegseth called criticism of the war effort "highly disingenuous" and pointed to "incredible battlefield successes." But the Strait remains closed, and the lawmakers who fund the military want to know when that changes.
Perhaps the most telling exchange came when Sen. Chris Murphy, a Connecticut Democrat, challenged Hegseth's claim that the U.S. could reopen the Strait at any time. Murphy said that was "not what has been testified to us in private briefings" and asked directly: "Why haven't you done if that's true?"
Hegseth responded that "we certainly have a lot more military pressure we can bring to bear if the president were to choose to do so."
Murphy then turned to Gen. Dan Caine, the Joint Chiefs of Staff chair, and asked how the public should measure the mission's success, especially given the gap between President Trump's claim last week that Tehran had only 18 to 19 percent of its capacity left and U.S. intelligence assessments reportedly finding Iran still has 70 percent of its missile and drone capability.
"How do we or the American public assess the success of the mission when you've stated publicly the purpose of the mission is to destroy their missile and drone capability? How do we assess whether we should continue funding this if you can't state [that]?"
Caine's answer was a wall. He said all battle damage assessment matters were classified and "it would be inappropriate for me to comment in this forum on that." When pressed further, Caine was even more direct: "I appreciate the question, but I'm not going to answer it."
The refusal to discuss even general metrics of success in a public hearing is the Pentagon's prerogative. But it leaves Congress, and the taxpayers funding a $29 billion conflict, with no way to independently verify whether the mission is working. Democrats have seized on that opacity. House Democrats have filed impeachment articles against Hegseth over the Iran conflict, an effort with no realistic path to passage but one that reflects the political temperature.
Sen. Lisa Murkowski, an Alaska Republican, raised the most constitutionally significant challenge of the day. The war surpassed the 60-day threshold under the War Powers Act of 1973 on May 1. Murkowski has been calling for a vote on military action against Iran beyond that timeline. Senate Majority Leader John Thune has not committed to scheduling her resolution for a floor vote.
On May 1, the president informed Congress there had been "no exchange of fire" since the start of the ceasefire and that the threat from Iran "remains significant." Trump characterized the ceasefire Monday as being on "life support." The U.S. and Iran traded fire last week.
Murkowski laid out the facts that undercut the administration's framing of hostilities as paused:
"When the president says hostilities have ended, we still have 15,000 troops that are forward deployed, more than 20 warships in an active naval blockade. [U.S. Central Command] has redirected 61 commercial vessels, disabled tankers. In other words, it doesn't appear that hostilities have ended."
Hegseth told the Senate that "should the president make the decision to recommence, that we would have all the authorities necessary to do so." That assertion, that the executive branch already possesses the legal authority to resume combat operations, is precisely the claim Murkowski and others want tested through a vote. The question is whether Republican leadership will let that vote happen.
The broader pattern is clear: Hegseth faces relentless political attacks from Democrats, but the more consequential pressure is coming from within the GOP conference, where members with actual appropriations authority are demanding answers the Pentagon has been reluctant to give.
Rep. Mario Diaz-Balart, a Florida Republican, steered the House hearing toward a different theater: Cuba, roughly 90 miles from the Florida coast. Diaz-Balart asked Hegseth directly whether Russian spy ships and warships, including the nuclear submarine Kazan, had repeatedly used Cuban ports.
"That is true," Hegseth said. He added that the administration has been "long concerned" about the situation and that "we don't want foreign adversaries attempting to use that island." Diaz-Balart said Cuba "poses a national security threat." Hegseth agreed: "I do."
The exchange came hours after President Trump posted on Truth Social about Cuba Tuesday morning. "No Republican has ever spoken to me about Cuba, which is a failed country and only heading in one direction, down!" Trump wrote. In a separate post, he added: "Cuba is asking for help, and we are going to talk!!! In the meantime, I'm off to China."
The juxtaposition was striking. In a congressional hearing room, the defense secretary confirmed Russian military vessels are operating out of Cuban ports and called it a national security threat. On social media, the president framed Cuba as a diplomatic opportunity. Those two positions are not necessarily contradictory, but they reflect a tension that Congress will eventually force into sharper focus. Trump's early confirmation battle over Hegseth was itself a test of loyalty; National Review reported at the time that Trump publicly backed Hegseth even as his nomination hung in the balance and the president reportedly considered alternatives.
The hearings did not produce any single dramatic confrontation. They produced something more important: a sustained, bipartisan, but notably Republican-led, demand for answers the Pentagon is not yet prepared to give in public.
How much will the Iran war cost? More than $29 billion, and rising. Is the mission succeeding? Classified. When will the Strait of Hormuz reopen? No timeline. Does the president need congressional authorization to keep fighting? The administration says no. Murkowski and others disagree.
The Pentagon's legal and institutional posture on classified information may be defensible on security grounds. But when the people who write the checks start asking hard questions and getting non-answers, the political math changes, regardless of which party controls the chamber.
Taxpayers are funding an eleven-week war with a price tag that climbs by billions between hearings, a shipping lane that stays closed, and a success metric the Pentagon won't share in daylight. Congress has every right to press harder, and the fact that Republicans are leading the charge should tell the administration something.