WASHINGTON (Reuters) - John McCain lost the 2008 U.S. presidential election to Barack Obama but has since won a leading role in Republican efforts to rein in Obama's big-spending economic revival plans. In the past week, the Arizona senator helped head a Republican charge in the Democratic-led Senate that stalled a $410 billion bill to keep government operations funded through the end of this fiscal year, September 30. "If it sounds like I'm angry it's because I am," McCain roared on the Senate floor. But after plenty of fiery debate, the bill was expected to win final congressional approval in...