Romney will NOT repeal Obamacare. If you think he will, you are going to be sorely disappointed...
I would say the international situation is too unstable for anyone to be making very confident predictions of how this election might go. If war breaks out in the Middle East, as appears quite possible, then it will drive the economy off the stage or at least become a second major issue (for many voters, of course for conservatives there are already other major issues).
So you think Romney would veto a bill to repeal Obamacare?