I first became aware of Donald Trump when he chose to make cheating on his first wife front-page news. It was the early '90s. Donald and Ivana Trump broke up over the course of months. Not that divorce is shocking, mind you; among the glitterati marriage seems more unusual. Nor is infidelity exactly novel. But it requires a particular breed of lowlife to advertise the sexual superiority of one's mistress over the mother of one's children. That was Trump's style. He leaked stories to the New York tabloids about Ivana's breast implants -- they didn't feel right. Marla Maples, by...