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Senate advances bill aimed at ending Iran war as Cassidy, after primary loss, flips to support

Four Republicans joined Democrats as the Senate voted 50-47 to advance a measure requiring congressional approval for further military action against Iran.

  • On Tuesday, the U.S. Senate advanced a war-powers resolution to end the Iran conflict unless President Donald Trump obtains congressional authorization, marking a rare rebuke 80 days after hostilities began.
  • Under the 1973 War Powers Act, a president may wage military action for 60 days before requiring congressional approval; the window expired in late April despite the administration's claim that hostilities had 'terminated'.
  • Republican Senator Bill Cassidy, recently defeated in his primary, provided the decisive vote for the 50-47 tally, joining GOP colleagues Rand Paul, Susan Collins, and Lisa Murkowski in breaking with party leadership.
  • House Republicans are expected to block the measure on Wednesday, while the resolution faces a near-certain presidential veto; Vice President JD Vance stated the administration remains 'locked and loaded' for military operations.
  • Nearly two-thirds of American voters believe Trump has failed to adequately explain the war's necessity, according to an Ipsos poll released earlier this week, as Democrats leverage this momentum to challenge the conflict.
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The U.S. Senate has for the first time given the green light to a resolution aimed at limiting the capacity of President Donald Trump to maintain the country's military involvement in the war against Iran without the express authorization of Congress.The proposal, presented by Democratic Senator Tim Kaine, managed to move forward thanks to the support of several Republicans who broke with the official line of their party, although the text still…

·Spain
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Idaho PressIdaho Press
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US Senate votes to advance resolution limiting Trump war in Iran as Cassidy flips

WASHINGTON — After voting no seven times, Sen. Bill Cassidy, R-La., flipped and cast the deciding vote to advance a War Powers Resolution to rein in President Donald Trump’s war in Iran without authorization from Congress.

·Cherokee County, United States
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9NEWS Denver broke the news in Denver, United States on Tuesday, May 19, 2026.
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