Senate opens health care debate

With the Senate set to begin debate Monday on health care overhaul, the all-hands-on-deck Democratic coalition that allowed the bill to advance is fracturing already. Yet majority Democrats will need 60 votes again to finish.

Some Democratic senators say they'll jump ship from the bill without tighter restrictions on abortion coverage. Others say they'll go unless a government plan to compete with private insurance companies gets tossed overboard. Such concessions would enrage liberals, the heart and soul of the party.