** FILE ** In this April 22, 2008 file photo, House Energy and Commerce Committee Chairman Rep. John Dingell, D-Mich. presides over a hearing of the committee on Capitol Hill in Washington. Rep. Henry Waxman of California has been selected by a key Democratic leadership panel to replace Dingell to head the crucial House committee with jurisdiction over energy, global warming and many other issues like health care. Waxman and Dingell, D-Mich., will still square off Thursday in a vote of House rank and file Democrats. (AP Photo/Susan Walsh, File)