The time had come to fire Khloé Kardashian. But first, Donald Trump had a question. “What’s your charity?” Trump asked. They were filming “The Celebrity Apprentice,” the reality-TV show where Trump schooled the faded and the semi-famous in the arts of advertising, salesmanship and workplace infighting. Most weeks, one winner got prize money for charity. One loser got fired. ... “I’m going to give $20,000 to your charity,” Trump said, according to a transcript of that show. He didn’t. After the show aired in 2009, Kardashian’s charity did receive $20,000. But it wasn’t from Trump. Instead, the check came from...