After an expensive primary spent backing dark-horse candidates like Newt Gingrich and Rick Santorum, the super PAC billionaires still have money to burn, and they’re spending it on Mitt Romney and the GOP establishment. Sheldon Adelson, the casino mogul who bankrolled Gingrich, gave $5 million to a super PAC linked to John Boehner and is holding a fundraiser for a Boehner group. Foster Friess, Santorum’s former patron, says he intends to back Romney. Prominent Rick Perry funders also say they’ll give. All this may be contributing to the Romney campaign’s new fundraising goal: $800 million by November, for a total of $1 billion, plus another $200 million from super PACs.