From MinnPost.com:

Gov. Tim Pawlenty is quoted today saying there appears to be “credible” evidence of fraud in Minnesota’s 2008 U.S. Senate race between Norm Coleman and Al Franken.
At the end of an appearance on Fox News, Pawlenty was asked about reports of felons voting in the 2008 election.
“There’s a group out here in Minnesota that’s investigated that,” Pawlenty said. “They seem to have found credible evidence that many felons who are not supposed to be voting actually voted in the Franken-Coleman election.”
He said he suspects that any illegally voting felons might have favored Franken, but hastened to add: “I don’t know that.”
But if true, he said, “it may have flipped the election.”
The lengthy recount ended with Franken declared the winner by 312 votes.