GOP mega-donor Sheldon Adelson was one of the biggest players in the 2012 Republican primary, bankrolling much of Newt Gingrich’s presidential bid, giving Mitt Romney’s PAC $20 million, and eventually donating nearly $150 million to GOP candidates and causes. But Adelson’s newest lobbying effort to ban Internet gambling puts him at odds with at least four Republicans with 2016 presidential aspirations and threatens to supercharge the GOP family feud with all the drama of a high stakes poker match. According to a report in The Washington Post, Adelson is planning a multi-front war to stop online betting, which is now legal in Nevada and Delaware, and will begin in New Jersey next week. In January, Adelson reportedly will launch the Coalition to Stop Internet Gambling, a public campaign to convince Congress and states to ban all forms of online gaming…