I think the majority of the MCCain Con votes were given to Romney however Romney and McCain were both not capable of expanding the Working Class/Lower Middle Class White vote and that was the difference. Obama was able to get his base to the polls.
Blaming voter fraud will keep us in denial of the obvious.
Running people like Romney = FAIL
Unless we appeal to the lower middle classes of people as this nation gets poorer - we are NOT going to win.