in the first place the GOP should have a different way to nominate their challenger as we saw with Ron Paul and his supporters at the nomination of MR. If they divided the candidates into liberals and conservatives and then voted on each group then MR wouldn't even have been there for the second vote for the nominee. Then the vote should have been from grass roots members over the internet after each contender has had 5 mins to say why we should vote for them.
After you have the most popular contender as your nominee then everyone will be able to accept the process and get behind the candidate.
Race should never play a part in any selection for a job.
voter fraud is responsible for the other variations from the per-election polls