Perhaps this will answer your question.....
In the '08 campaign, Republican Sen. Norm Coleman was running for re-election against Democrat Al Franken. It was impossibly close; on the morning after the election, after 2.9 million people had voted, Coleman led Franken by 725 votes.
Franken and his Democratic allies dispatched an army of lawyers to challenge the results. After the first canvass, Coleman's lead was down to 206 votes. That was followed by months of wrangling and litigation. In the end, Franken was declared the winner by 312 votes. He was sworn into office in July 2009, eight months after the election.
During the controversy, a conservative group called Minnesota Majority began to look into claims of voter fraud. Comparing criminal records with voting rolls, the group identified 1,099 felons -- all ineligible to vote -- who had voted in the Franken-Coleman race.
When 1,099 Felons Vote In A Race Won By 312 Ballots - Byron York - Page 1