WASHINGTON (CNN) - The first crucial showdown over health care reform by the full Senate could come as early as next Tuesday.
That's when Senate Majority Leader Harry Reid hopes the chamber will vote to start debate on health care legislation.
Though Reid put the wheels in motion for next week's vote, nothing is guaranteed.
Democrats need 60 votes to pass the motion to start debate. While there are 60 members in the Democrats' coalition, Ben Nelson, a moderate Democrat from Nebraska – says he hasn't decided whether he will give his party his vote, and won't until he sees the actual bill.
In fact, no one has seen the senate health care bill yet. Reid won't release the legislation until he knows the cost of the bill. Reid, a Democrat from Nevada, has been waiting nearly three weeks for the non partisan Congressional Budget Office to return its score, or cost, of the bill. Aides to the Senate Majority Leader say they expect the CBO information on the cost of the bill by the end of this week.
Saturday the House of Representatives voted 220 to 215 to pass their version of health care reform. Any legislation that emerges from the full Senate would then have to be reconciled with the House bill.
CNN Deputy Political Director Paul Steinhauser contributed to this report