Salt Lake Tribune: A U.S. senator wants the Justice Department to step in against the nation’s top environmental cop after he cleared the way last week for new, coal-fired power plants — including some in Utah — to be built without regard to their impact on global warming. Sen. Barbara Boxer, D-Calif., says EPA Administrator Stephen Johnson “has run amok.” She wrote Monday to U.S. Attorney General Michael Mukasey to demand that he have the “blatantly illegal” policy suspended. A “renegade” …