I feel his victory had four contributing factors:
1) Fraud: It accounts for a percentage.
2) Geek factor: Numerical analysis dictated the precints to be focused on, to the exclusion of all others. With these precincts, the victory was assured.
3) Dumbass voters.
4) Poor Republican candidate, who only had one or two shining moments all campaign, and who was too far to the left to be a clearcut choice away from Obama.