"MADISON — On a prank call that quickly spread across the Internet, Wisconsin Gov. Scott Walker was duped into discussing his strategy to cripple public employee unions, promising never to give in and joking that he would use a baseball bat in his office to go after political opponents.
Walker believed the caller was a conservative billionaire named David Koch, but it was actually the editor of a liberal online newspaper."
More at the link below. Also a link in the story if you want of listen to the audio (also found on youtube, etc.)
http://www.wausaudailyherald.com/article/20110224/WDH0101/302240074/Walker-shares-union-strategy-with-prank-caller-hear-the-audio