Senator Scott Brown at the start of the State of the Union address on January 25, 2011.Scott Brown isn’t himself. Which is to say, he isn’t sounding much like the square-jawed, truck-driving, barn-jacket-bedecked Scott Brown—the calm, cool, collected Captain America—who stunned the political world a year ago by winning the special election to replace Ted Kennedy in the U.S. Senate. It’s lunchtime in the blue-collar town of Pittsfield, Mass., and Brown, who’s touring the Berkshires fo...