House Freedom Caucus Chairman Mark Meadows predicted Monday that the House would pass a last-ditch effort to repeal Obamacare if it clears the Senate, with conservatives getting on board.

The North Carolina Republican said in an interview that while it’s too early for his group to take a position on the 11th-hour Obamacare replacement bill authored by Sens. Lindsey Graham (R-S.C.) and Bill Cassidy (R-La.), he is “very optimistic” about its prospects in the House. Graham and Cassidy are rushing to beat a Sept. 30 deadline to get their legislation through the Senate before a fast-track mechanism allowing it to pass with a bare majority expires.

Meadows and a number of conservatives, including Sen. Mike Lee (R-Utah), are holding out for additional changes to give states more flexibility. But Meadows said the legislation, in whatever form it landed, would likely become a “binary choice” for House Republicans should it clear the Senate.