FILE - In this July 14, 2010 file photo Rep. Tom Petri, R-Wis. appears at a hearing at the Transportation and Infrastructure Subcommittee on Aviation on airline fees on Capitol Hill. The 6th Congressional District in Wisconsin will see a change in the leadership style it's grown accustomed to when Petri retires after more than three decades in public office. (AP Photo/Charles Dharapak, File)