US President Donald Trump is heading for a too-close-to-call vote on his troubled healthcare bill in the House.
Trump would suffer a huge blow if one of his major election pledges, to repeal and replace the programme known as Obamacare, fell at the first hurdle.
Asked on Friday about the vote, he just said: "We'll see what happens."
Even if the bill does pass the House, it could face a tougher passage in the Senate, where Republicans have only a slender majority.
On Thursday, Mr Trump reportedly told mutinous Republicans that if they did not vote for his bill - dubbed Trumpcare by Democrats - they would be stuck with President Obama's act for good.
White House officials told the representatives at a meeting earlier that day that Mr Trump had finished negotiating and would move on with the rest of his agenda if the bill failed.