Even as Newt Gingrich’s campaign teetered on the edge of collapse in March, the wife of a casino mogul gave a pro-Gingrich super PAC another $5 million. The contribution brought the Adelson family’s pro-Gingrich tally to $20 million — a figure Sheldon Adelson himself was floating in December, POLITICO reported. The Adelsons almost single-handedly funded Winning Our Future’s operations since its inception in December, but in recent days, Adelson has signaled he will put his wealth behind establishment Republican candidates. The super PAC, Winning Our Future, ended last month with $5.76 million in its account, having raised $5.05 million while...