President Donald Trump, at his daily coronavirus briefing on Wednesday, threatened to use his Article II powers laid out in the U.S. Constitution to force Congress to adjourn so he can make recess appointments for vacant spots in his administration.

The Constitution does say a president can, “on extraordinary occasions” convene both chambers of Congress, or if the chambers can’t agree on adjourning, “he may adjourn them to such time as he shall think proper.” That means, if the Republican-controlled Senate moves to adjourn and the Democratic-held House refuses, Trump can step in to end the current session of Congress.