When Maria Andrews’ mother came home with a load of heavy groceries and found a broken elevator at the modest brick Tysens Park Apartments on Staten Island, she wasn’t expecting to get much help from building management. But then she saw Fred Trump pull up in an elegant black limousine. She put down her groceries and rapped on the limo’s tinted window to complain to the real estate royal who owned her building. To her surprise, the elder Trump came out and helped her carry her groceries up five flights of stairs, Andrews says today — and he stayed for...