Congressman Joe Garcia’s chief of staff abruptly resigned Friday after being implicated in a sophisticated scheme to manipulate last year’s primary elections by submitting hundreds of fraudulent absentee-ballot requests. Friday afternoon, Garcia said he had asked Jeffrey Garcia, no relation, for his resignation after the chief of staff — also the congressman’s top political strategist — took responsibility for the plot. Hours earlier, law enforcement investigators raided the homes of another of Joe Garcia’s employees and a former campaign aide in connection with an ongoing criminal investigation into the matter. “I’m shocked and disappointed about this,” Garcia, who said he...