He won't say whether he's got 60 votes to pass it, but Senate Majority Leader Harry Reid has scheduled a Saturday vote to move the health care bill forward.

Republicans have been working to persuade members not to vote in favor of this procedural vote if they're planning to vote against health care. They warn their colleagues not to be in the position of having to say "I was for it before I was against it," echoing Sen. John Kerry's flip-flop on Iraq.

Three centrist Democrats are still wild cards on this vote: Nebraska Sen. Ben Nelson, Louisiana Sen. Mary Landrieu and Arkansas Sen. Blanche Lincoln have not committed to even voting for the procedural measure to allow the debate to proceed.