Melania Trump gazes out of her living room window over the gold tapestry of New York's Central Park. It's late November, and from her spacious apartment, which occupies the top three floors of the 68-story Trump Tower, in Midtown Manhattan, the 843 acres nestled among the gray sea of buildings below seem small, like a wet towel left on the bathroom floor by a teenager. Melania, 45, dressed in a pink cap-sleeved Antonio Berardi sheath dress and matching Louboutin heels, nods over her shoulder grimly. "That building," she says, gesturing toward another skyscraper under construction at the corner of 57th...