Sen. Bill Cassidy voted with the majority of Republicans late Wednesday to block a resolution aimed at reining in the president's war powers.
Republicans returning to Washington on Monday are facing questions about a $1 billion Senate security proposal that could help pay for President Trump's ballroom as Democrats say they will try to defeat it.
The Senate has taken the first steps in a new effort to reopen the Department of Homeland Security, voting to adopt a budget plan that would fund ICE and Border Patrol over Democratic objections.
Congress returns from its two-week recess early this week -- thrusting lawmakers back into the debate surrounding the Iran war as the President Trump's strategy faces continued scrutiny.
House Speaker Mike Johnson and Senate Majority Leader John Thune announced a plan for the Republican-controlled Congress to fully fund DHS "in the coming days."
President Trump is encouraging Congress to cut its recess short and fund the Department of Homeland Security, White House press secretary Karoline Leavitt said.