Three Republican senators broke with their leadership Wednesday and voted to advance a Democratic-sponsored resolution under the 1973 War Powers Act to halt the conflict with Iran unless Congress formally authorizes further military action.

The measure, brought under the 1973 War Powers Resolution, failed by a single vote, 50 to 49. It was the seventh attempt in the Senate to pass such a measure since the war began in late February, and the first time Senator Lisa Murkowski, Republican of Alaska, voted for it.

The Senate rejected another attempt by Democrats to limit President Trump's ability to use military force against Iran, but one new Republican senator voted in favor of advancing the measure.

Sen. Lisa Murkowski (R-Alaska) is leading a push within the Senate Republican Conference for a vote on a resolution to authorize the use of military force against Iran beyond the 60-day window set by the 1973 War Powers Act.

Sen. Lisa Murkowski (R., Alaska) condemned President Trump's threat that “a whole civilization will die tonight” unless Iran reopens the Strait of Hormuz, saying on social media that his rhetoric "is an affront to the ideals our nation has sought to ...