President Donald Trump’s declaration of an emergency on the US-Mexico border looks likely to be dealt a blow by members of his own party.
Republican dissident senators are expected to thwart him as the Senate votes imminently on a proposal to revoke his declaration.
The Democratic-controlled House of Representatives last month backed the measure.
Mr Trump said he would “probably” have to veto the resolution.
The president declared the emergency in an attempt to circumvent Congress and fund his long-promised border wall.
Speaking to reporters at the White House on Thursday, he said: “Pure and simple, it’s a vote for border security.”
He earlier called Democrats “border deniers” and said any Republican opposing him would be casting “a vote for Nancy Pelosi”.