Raising prospects for a major election-year ruling, the Obama administration launched its Supreme Court defense of its landmark health care overhaul Wednesday, appealing what it called a "fundamentally flawed" appeals court decision that declared the law's central provision unconstitutional.

Destined from the start for a high court showdown, the health care law affecting virtually every American seems sure to figure prominently in President Barack Obama's campaign for re-election next year. Republican contenders are already assailing it in virtually every debate and speech.

The administration formally appealed a ruling by the federal appeals court in Atlanta that struck down the law's core requirement that individuals buy health insurance or pay a penalty beginning in 2014.

At the same time, however, the winners in that appellate case, 26 states and the National Federation of Independent Business, also asked for high court review Wednesday, saying the entire law, and not just the individual insurance mandate, should be struck down.