Romney doesn’t have to beat Obama in the general election.
Obama is not running against Romney. Obama is running against his own economic record, which is why he loses.
Many on the right (including me) will not because of his moderate to left leaning policies and the fact that he was foisted upon us by the squishy GOP.
Many more on the right will not vote for him because they can't get past the fact that his religious beliefs differ from their's; a fact that the left and the media (I know, redundant) will hammer away at relentlessly.
If he can't get the right to vote for him, and the left certainly won't, Obama wins easily. Almost as if by forfeit.