Senate brinkmanship is leaving a planned August recess up in the air as Republicans threaten to keep Democrats in Washington to confirm President Donald Trump’s nominees.

Senate Majority Leader John Thune (R-SD), who met with Trump on Monday, has left the door open to canceling part or all of the August break as Democrats throw up procedural hurdles that eat up hours of floor time. Speaking with reporters this week, he said that Trump is the first president in history to have no nominees approved by unanimous consent or voice vote at this stage in his presidency.