Washington (CNN) - To debate or not to debate the Senate's health care reform bill; that is the question.
The legislative body on Saturday is expected to vote on whether to begin debate - also known as invoking cloture - on its version of the health care bill, which was introduced Wednesday by Senate Majority Leader Harry Reid.
Reid says the 2,074-page bill would expand health insurance coverage to 30 million more Americans at an estimated cost of $849 billion over 10 years. A House bill was passed nearly two weeks ago.
Proceedings begin at 10 a.m. and will last through the early evening.
Around 8 p.m., the Senate will hold a roll call vote on the motion to invoke cloture.
Reid needs 60 votes in the 100-member Senate to overcome a certain GOP filibuster attempt and open the chamber's debate on the bill. It would take another 60 votes to close debate that could last for weeks, while final approval of the bill would require only a simple majority.
So how will the Democratic leadership get the magic number 60?