FILE - In this July 14, 2010 file photo, Rep. Tom Petri, R-Wis., listens on Capitol Hill in Washington. A congressional review panel says there is substantial reason to believe that Petri violated House rules by acting on behalf of two companies in which he owned significant amounts of stock. The independent Office of Congressional Ethics says Petri advocated for Oshkosh Corp. and the Manitowoc Co. despite owning at least $250,000 worth of Oshkosh stock and at least $100,000 worth of stock in Manitowoc. Both companies are based in Wisconsin. (AP Photo/Charles Dharapak, File)