Possible but not likely that fraud accounted for the margin of victory.
A poor campaign by Willard was a bigger factor.
You beat me to it.
O ran a real re-election campaign in the swing states while Romney's was incompetent. A number of his frustrated volunteers have come out and admitted how inept it was, and they were posted here in threads. Alternative the O campaign has been bragging exactly how their 'get out the vote ' campaign worked and was planned to work.,
Once we descend into ‘All the polls and the election was rigged to make it look like Romney lost when he really won ‘ its JIm Jones cult time.
Nothing else to do but sip the poison Koolaid.