It is no secret that Democrat strongholds are rife with fraud. The vast majority of the dead who vote manage to vote Democrat. The vast majority of districts who have more votes cast than they have voters also vote Democrat. The DoJ dropped charges against Black Panthers who stood outside of polling places armed. The DoJ also refused to investigate districts where the Black Panthers went into voting places, tossed out the inspectors and made sure that 100% of votes cast were cast for Obama.
ACORN, a group tied very closely to the Obama campaign, was prosecuted in multiple states for vote registration fraud.