WASHINGTON (AP) - Supreme Court justices will be diving into the heart of the battle over the health care overhaul tomorrow -- hearing arguments about the constitutionality of the requirement that Americans buy health insurance.
    
During today's session, the justices considered whether it's premature for them to rule on the merits of the case, since Americans aren't yet being forced to pay the penalty for not having the insurance.

But the justices indicated the issue won't stand in the way of a ruling.
    
Solicitor General Donald Verrilli Jr., defending the health law, urged to court to decides what he called "the issues of great moment" at the heart of the case.