US Representative Michael E. Capuano, who decried violent political rhetoric after last month’s fatal shooting rampage in Tucson, said today he regrets urging union workers at a rally in Boston on Tuesday to “get a little bloody.” “I strongly believe in standing up for worker rights and my passion for preserving those rights may have gotten the best of me yesterday in an unscripted speech,” the Somerville Democrat said in a statement released this afternoon. “I wish I had used different language to express my passion and I regret my choice of words." Capuano was referring to remarks he made...