The United States Senate has narrowly approved a bill aimed at curbing presidential authority over potential military action against Iran, marking a significant legislative move in the ongoing debate over war powers between Congress and the White House.
The measure, passed on Tuesday by a 50–48 vote, requires that President Donald Trump either halt any military operations against Iran or seek explicit congressional approval before authorising further action. The legislation had already cleared the House of Representatives, where it passed earlier this month by a 215–208 margin, before moving to the Senate for final consideration.
Although the Senate is controlled by Trump’s Republican Party, the vote revealed notable bipartisan divisions. Four Republican senators broke ranks to support the bill, joining Democrats in backing the measure. Those Republicans were Bill Cassidy of Louisiana, Lisa Murkowski of Alaska, Susan Collins of Maine, and Rand Paul of Kentucky. Two other Republicans, Mitch McConnell of Kentucky and Dave McCormick of Pennsylvania, chose to abstain. On the Democratic side, Senator John Fetterman of Pennsylvania was the only member of his party to oppose the bill.
Democratic leader in the Senate, Chuck Schumer, described the vote as part of a long-running effort to reassert congressional authority over decisions of war and peace. He said it represented the tenth attempt to limit presidential military powers regarding Iran, but insisted this was the first successful passage of what is often referred to as a war powers resolution.
Schumer also criticised Trump’s approach to Iran policy, arguing that promises of “maximum pressure” had instead contributed to instability and heightened risk of conflict for American interests.
Despite its passage, the bill’s practical impact remains uncertain. Analysts note that the president could still veto the legislation, which would require a two-thirds majority in both chambers of Congress to override. Given the current political balance, such a threshold would be difficult to achieve.
The broader context of US–Iran relations remains tense. According to the report, military hostilities between the United States and Israel and Iran reportedly began on 28 February. A subsequent understanding between the parties is said to have led to ongoing negotiations, with discussions taking place in Switzerland and involving mediation efforts by Pakistan and Qatar. Both sides are reportedly working towards a potential comprehensive agreement within a 60-day framework.
Even as diplomatic channels remain open, the Senate vote underscores persistent divisions in Washington over the limits of presidential war-making authority and the future direction of US policy towards Iran.
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