And the best part is, it's not Acorn, it's not one, not two, but at least three branches of the Republican party.
An agreement announced today by Obama for America, the Republican National Committee, the Democratic National Committee, the Michigan Republican Party, the Michigan Democratic Party, the Macomb County Republican Party, the Macomb County Democratic Party, and plaintiffs Duane Maletski, Sharon Lopez, and Frances M. Zick protects the voting rights of foreclosure victims. The settlement acknowledges the existence of an illegal scheme by the Republicans to use mortgage foreclosure lists to deny foreclosure victims their right to vote. This settlement has the force of law behind it and ensures that Republicans cannot disenfranchise families facing foreclosure.
So the updated score those arrested or confessed to have committed election fraud (by party)
Republicans 2 (incidents, many more people)
For those who actually fell for the Acorn hoo-haw and wonder about where it came from, I recommend you look into the term projection.
Election 2008, Fraud, Republicans