“This resolution is an unnecessary, dangerous attempt to weaken my constitutional authorities, endangering the lives of American citizens and brave service members, both today and in the future,” Trump said in a statement.

The measure had passed the House on a 247-to-175 vote this month and was approved by the Senate last month with the support of seven Republicans.

This month’s House vote marked the first time both chambers had acted to invoke the same war-powers resolution to end U.S. military engagement in a foreign conflict. It also represented the latest instance of Congress’s challenging Trump’s decisions as commander in chief.