The Supreme Court's ruling on the constitutionality of President Barack Obama's health care overhaul is likely to shake the presidential election race in early summer. But the winners in the court will not necessarily be the winners in the political arena. No doubt, a decision to throw out the entire law would be a defeat for Obama. But it would not spell certain doom for his re-election. In fact, it would end the GOP argument that a Republican president must be elected to guarantee repeal of the law. It also could re-energize liberals, shift the spotlight onto insurance companies and reignite a debate about how to best provide health care.