Reuters: A breakthrough deal forged by delegates from 190 countries has revived world efforts to fight global warming and may help push the debate to the front and center of the U.S. political debate. The United States joined the deal reached on the Indonesian island of Bali in a dramatic U-turn. But significantly, the accord sets late 2009 as the target for a climate treaty, months after U.S. President George W. Bush leaves office. Sen. Barbara Boxer, a California Democrat who heads …