Your win in NC is not a victory over the politics of division. It is a testament and monument TO the politics of division. You won in NC because way back in February you painted the Clintons as racists and African Americans in SC voted for you in huge numbers. Since then, African Americans have voted for you in a near monolithic block.
Say hello to president McCain because all of the people in the middle who are swing voters are going to vote for the adult in the race, that leaves you out.