Sheldon Adelson plays as stubbornly in politics as he does in business. So the criticisms that he’s trying to personally buy the presidential election for Newt Gingrich are met with a roll of the eyes. “Those people are either jealous or professional critics,” Adelson tells me during his first interview since he and his wife began funneling $11 million, with another $10 million injection widely expected, into the former speaker’s super PAC, Winning Our Future. “They like to trash other people. It’s unfair that I’ve been treated unfair—but it doesn’t stop me. I might give $10 million or $100 million...