FILE - In this April 4, 2011 file photo, Rep. John Conyers, D-Mich., listens during a news conference on Capitol Hill in Washington. Conyers hopes to extend a political career dating to the mid-1960s in Michigan's primary election Tuesday, Aug. 7, 2012. Now serving his 24th term, he has four Democratic challengers in a newly configured district. (AP Photo/J. Scott Applewhite, File)
