Representatives Thomas Massie, a Kentucky Republican, and Ro Khanna, a California Democrat, introduced a bipartisan House resolution last week in a bid to curb President Donald Trump's ability to escalate tensions with Iran.

As Mr. Trump last week weighed whether to use direct military force against Iran, a bipartisan contingent of lawmakers demanded that the president seek congressional approval before moving forward with any action.

Speaker Mike Johnson signaled he was not inclined to allow a vote on whether to authorize military strikes in Iran, while leading Democrats demanded a briefing and said the president had overstepped his power.