Roland Burris is now officially a U.S. senator. The Illinois Democrat was sworn-in by Vice President Dick Cheney Thursday at a Capitol Hill ceremony. His new colleagues in the Senate chamber responded with applause. He takes his Senate seat alongside fellow Democrats who initially turned him away, and who had vowed not to seat anyone appointed by embattled Gov. Rod Blagojevich. The governor, who's been impeached by state lawmakers, is accused of trying to sell the Senate seat that had been held by President-elect Barack Obama. Burris is now being given a polite welcome by Democrats, who say they never...