The New York billionaire has slowly begun to add paid staff in a handful of swing states — Wisconsin and Iowa, among them — even as campaign officials concede the presumptive presidential nominee has little desire or capacity to construct the kind of massive national operation that has come to define modern-day White House campaigns. Trump plans instead to depend upon the national Republican Party to lead state-based efforts on his behalf, while Democrat Hillary Clinton has had an army of staff dedicated specifically to her campaign in general election battlegrounds for months.