看看这段
It is conceivable that Mr. Boehner could pass a debt-limit increase with a
slim majority of Republican votes, with Democrats making up the difference,
as he has in the past on budget measures. But moving in that direction poses
risks of a threat to Mr. Boehner’s leadership position from a watchful
conservative bloc, which has warned that his post could be on the line if he
goes against the legislative position of large numbers of the rank and file
.
Representative John C. Fleming, Republican of Louisiana and one of his
conference’s more conservative members, said that he doubted Mr. Boehner
would be able to pass any bill — with or without Democratic support — that
did not extract some significant concessions from Mr. Obama and Senate
Democrats.