Congresswoman Tammy Baldwin is asking for a federal investigation into the surprise discovery of 14,000 votes in Waukesha County for the Wisconsin Supreme Court race.
The Wisconsin Democrat sent a letter to U.S. Attorney General Eric Holder Friday night asking him to assign the Justice Department Public Integrity Section. It oversees the federal prosecution of election crimes.
A message left by The Associated Press at Holder's office Saturday wasn't immediately returned.
Waukesha County Clerk Kathy Nickolaus said "human error" resulted in the miscount there. The change gave incumbent Justice David Prosser a 7,500-vote edge over challenger JoAnne Kloppenburg.
In the letter, Baldwin says the mishap raises serious doubts as to the integrity of the state's electoral process.