Democrat Hillary Rodham Clinton's deputy campaign manager has stepped down amid a string of losses to rival Barack Obama. Mike Henry announced his departure Tuesday, a day after Maggie Williams replaced Patti Solis Doyle as Clinton's campaign manager. Solis Doyle had recruited Henry to join the team last year. Henry was the campaign's main field architect and was best known for penning a memo last spring urging Clinton not to compete in Iowa. He called it "our consistently weakest state." The memo was leaked to the media, which embarrassed Clinton as she was beginning to build an organization in Iowa.