Senate rejects bid to restrain Trump's war in Iran

• Kentucky's Rand Paul was the only Senate Republican who voted with Democrats to advance the War Powers resolution, which failed 47-53. Sen. John Fetterman (D-Pa.) was the lone Democrat to oppose the measure.
• The vote followed several days of classified Capitol Hill briefings from top Trump officials that left both parties questioning how long the U.S. operation in Iran will last.

The big picture: GOP leaders have thrown their support behind Trump's military actions against Iran, arguing that an imminent threat to U.S. national security justified the preemptive attack.

• But Democrats were hopeful that enough Republican moderates would side with them on the War Powers vote to advance the measure and send a symbolic rebuke to the White House.
• Democrats argued that Trump cannot unilaterally initiate a war with Iran and appealed to Congress to assert its constitutional power over military affairs.

• Those moderates, including Indiana's Todd Young, Maine's Susan Collins and Alaska's Lisa Murkowski, ultimately sided with their party and voted against the resolution.

What's next: Democrats are eyeing other ways to force Republicans to go on the record about supporting the war in Iran.

• That includes a push in the Senate to force a formal Authorization for Use of Military Force vote, which multiple Democrats told Axios this week was a necessary next step.