Democratic senators on Tuesday warned that the Trump administration risks dragging the United States into another prolonged Middle East conflict, as a tense Senate Appropriations Subcommittee on Defence hearing exposed deep divisions over the ongoing war with Iran and its escalating economic and military costs.

Key Developments at the Senate Hearing

The hearing centred on President Donald Trump's proposed $1.5 trillion defence budget. Several Democratic lawmakers drew pointed comparisons to past US wars in Iraq and Afghanistan, questioning whether the administration had any coherent long-term strategy for the Iran conflict.

Senator Chris Coons challenged Secretary of War Pete Hegseth repeatedly over the administration's failure to reopen the Strait of Hormuz, where ongoing Iranian pressure on shipping has driven up oil and fuel prices globally. "There used to be a consensus in national security, that America should only go to war when there's an imminent threat to our national security, when all other options have been exhausted, and when we have clear objectives and a plan for how it ends," Coons said. He added: "My concern, Mr Secretary, is that you've achieved a series of tactical successes but are on the verge of a strategic loss."

Democrats Challenge Strategy and Legal Authority

Senator Christopher Murphy warned that the administration was underestimating Iran's capacity to endure sustained economic and military pressure. "This is a high-risk strategy," Murphy said, cautioning that Iran might withstand sanctions and military action for years while American families bore the brunt of soaring fuel costs. He argued that "time is not on our side here" as rising oil prices were already hurting US farmers and households.

Senator Patty Murray sharply criticised the scale of the Pentagon's budget request, accusing the administration of prioritising military spending over domestic needs. "You're spending families' hard-earned tax dollars on a war that many strongly oppose," Murray said. "You want to increase the war budget for the next year by half a trillion dollars." She invoked former President Dwight Eisenhower's warning about the costs of military expansion, saying the proposed defence budget would leave Americans "cold and hungry to fund Trump's war."

Democrats also pressed the administration on its legal authority for the conflict. Senator Lisa Murkowski questioned whether the administration should seek a formal Authorisation for Use of Military Force (AUMF) from Congress as military deployments continued across the region.

What the Administration Said

Hegseth defended the administration's conduct throughout the hearing, arguing that President Trump had succeeded where previous administrations had failed. "We have more leverage than we've ever had," Hegseth said, insisting the campaign was essential to prevent Iran from acquiring a nuclear weapon.

The Financial and Strategic Cost

The Iran conflict has already cost an estimated $29 billion, according to Pentagon officials, with lawmakers warning the final bill could rise significantly as military operations continue and damage to US facilities across the Middle East becomes clearer. This comes amid broader US balancing acts involving tensions with China, Russia, and ongoing support for Ukraine — raising fears in Washington that resources and strategic attention are being stretched dangerously thin.

Notably, the hearing reflects a growing pattern: each successive Middle East escalation has prompted the same congressional questions about exit strategies and legal authorisation — questions that have rarely produced binding constraints on executive war-making. Whether this Congress acts differently remains the defining question ahead.