SCOTUS vs POTUS

The Supreme Court of The United States is hearing arguments concerning the constitutionality of the Affordable Care Act, aka Obamacare. The question in my mind is, why now? This year is a presidential election year. The GOP has already made the repeal of Obamacare as an issue to be settled in November. Now we have nine Justices stepping in to decide the issue before the electorate has a chance to express its opinion via the ballot box. What's the hurry? The key parts of the Affordable Care Act do not go into effect until 2014. I dare say that SCOTUS is mixing politics with constitutional law and in doing so is usurping our right to accept or reject the intent of the Affordable Care Act based on its merits. SCOTUS should have waited until someone was injured by the Affordable Care Act before acting on its constitutionality. To date, the only entity injured has been the GOP. The Supreme Court stole one election in 2000, are they poised to steal the 2012 election?