Add John Mellencamp to the list of musicians who have asked politicians to stop playing their songs. Mellencamp, a Democrat for union rights, is not happy that Wisconsin Gov. Scott Walker, who wants to do away with collective bargaining, is using the rocker's song Small Town for his re-election campaign.

He's a very liberal person, Mellencamp's spokesman, Bob Merlis, told the Associated Press. He appeared at the Democratic National Convention in 2004. His wife at the time was a delegate at large. He's very pro-collective bargaining and the fight for a living wage.

Mellencamp has asked Walker to stop playing Small Town, and while politicians usually comply with such a request, it's unclear whether the Wisconsin governor will back off.

Walker, 44, is facing a recall election in June spurred by his decision to propose legislation that would do away with collective bargaining for most public workers. The legislation was passed by state lawmakers, which set off massive protests in Wisconsin.

Mellencamp does not want to be associated with Walker through use of Small Town, a song released in 1985 about his growing up in Indiana. The song soared as high as No. 6 on the Billboard Hot 100 chart.

The 60-year-old rocker is the latest musician to ask political candidates and elected officials to stop playing their songs at rallies or as a theme song for the campaign. Click through the slideshow to see other entertainers who did not want their songs used for political purposes.