Calling the federal agents who seized Elián González ''armed thugs,'' the campaign of Republican U.S. Senate candidate Mel Martinez chided Democratic opponent Betty Castor on Friday for campaigning with the U.S. attorney general who sent the shipwrecked boy back to Cuba four years ago. The language provoked outrage from Castor's campaign and from the national union that represented the immigration officers who took Elián from his Miami relatives and returned him to his father at the behest of then-Attorney General Janet Reno. ''Those were law enforcement officers doing their jobs, risking their lives,'' Castor spokesman Dan McLaughlin said of the...