WASHINGTON - Vice President Dick Cheney chose someone in his own likeness to be his new chief of staff. Like Cheney, David Addington shuns the limelight. And like Cheney, Addington already has made a large imprint on the Bush White House. At Cheney's side since the 1980s, Addington has been a behind-the-scenes player in one after another of the hot-button controversies the Bush administration has faced: _The CIA leak probe. _The fight to disclose which corporations advised the White House on energy policy. _The dispute over the treatment of suspected terrorists. _The White House disagreements with the Sept. 11 commission...