A Freedom Caucus spokeswoman says more than 25 members are opposed. It takes only 22 GOP lawmakers to block the bill.
House conservatives say they have the votes to bring down a Republican plan to repeal Obamacare, as more than two dozen members of the hard-line Freedom Caucus rejected President Donald Trump's entreaties to unite behind his bill.
It would take 22 Republican "no" votes to block the legislation, which is scheduled for a vote on Thursday.