A triumphant Scott Brown arrived to a rock star’s welcome outside the Russell Senate Office Building today to begin the whirlwind swearing-in process. “Hold on. Let me get my certification papers,” said the U.S. Senator-elect as he pulled up in a Cadillac Escalade. He had to leave his trusty old GMC Canyon pickup at home for the flight to the Capitol. “I’m happy to be here,” he told the press swarming around his vehicle. Brown then pulled his certification papers out of the back. When asked what his top priority would be after being sworn in today at 5 p.m.,...