The Supreme Court on Wednesday wrapped up its exhaustive three-day session which will determine the fate of the federal health care overhaul, ending with what is arguably the most consequential question of the case -- if the individual mandate is struck down, does the law survive?

The nature of questioning over the last few days signaled several judges have serious doubts about the law. But they hardly indicated which way the often-divided court would rule, with a decision expected by summer.

In an election year, the case dealing with the incumbent president's most significant domestic policy achievement is a blockbuster. On the final day of arguments, the gravity of the decision was evident, as justices struggled over what to do with the rest of the Affordable Care Act if they also rule that its central provision is out of bounds.

The question dealt with whether the entire health care law should stay or go or be revised if the so-called individual mandate -- the requirement that everyone buy health insurance -- is struck down. That, and a debate over the law's Medicaid requirements, filled the last day of discussion in the landmark hearings...