ACORN been raided by the FBI in state after state (11 so far)!
What makes ACORN particularly embarrassing for Obama is that he used to be one of them. He served as general counsel for ACORN in Illinois, channeled millions to the organization from the Chicago Annenberg Challenge (whose funds he distributed) and has lately spent $800,000 of his campaign money to subsidize the group's activities.
For this emolument, ACORN has registered voters 15 times over, canvassed the graveyards for votes, and prepared to commit electoral fraud on a massive scale.
With friends like this, Obama doesn't need enemies.