WASHINGTON – Rep. Henry Waxman — a liberal ally of Speaker Nancy Pelosi — has wrested the chairmanship of the powerful House Energy and Commerce Committee from veteran Rep. John Dingell when the new Congress convenes in January. Waxman, a California liberal and avid environmentalist and booster of health care programs, toppled Dingell Thursday on a vote of 137-122 in the Democratic Party caucus, capping a bitter fight within party ranks. Dingell has been the top Democrat on the panel for 28 years and is an old-school supporter of the auto industry. Waxman has complained that the committee has been...