In 2009, I covered some voting shenanigans by Obama supporters in Ohio.
Three individuals were eventually convicted for voting illegally in Ohio (click this link for the posts).
In essence, out of state Obama volunteers came to Ohio to get out the vote and vote illegally in the state because Ohio was considered a swing state. The volunteers were from New York which was considered safe for Obama. There was no finding that the Obama campaign directed the activities but it hasn’t ever been proven that the campaign did not know.
Democrats have been downplaying Republican concerns about voter fraud but it appears that there are at least some reasons for their worries. Yesterday, Vote from Home folded operations in Ohio because it was learned that some of their members had indeed voter incorrectly. Their votes were disallowed. Some Obama workers have withdrawn their votes as well.
Another effort to organize voters is Vote Today Ohio. Co-founded by Tate Hausman, a political organizer and member of the Working Families Party in New York, Vote Today Ohio says that the group exists to bring unlikely voters into the polls and boasts that they are responsible for at least 3300 votes.
In addition to bringing people to the polls legally, Vote Today Ohio members voted illegally and eventually were indicted for their actions.