evidence: If Americans had heard of Leo at all, it was for his role in building the conservative supermajority on the Supreme Court. He drew up the lists of potential justices that Donald Trump released during the 2016 campaign. He advised Trump on the nominations of Neil Gorsuch, Brett Kavanaugh and Amy Coney Barrett. Before that, he’d helped pick or confirm the court’s three other conservative justices — Clarence Thomas, John Roberts and Samuel Alito. But the guests who gathered that night under a tent in Leo’s backyard included key players in a less-understood effort, one aimed at transforming the entire judiciary. [...] The judges were in Maine for a weeklong, all-expenses-paid conference hosted by George Mason University’s Antonin Scalia Law School, a hub for steeping young lawyers, judges and state attorneys general in a free-market, anti-regulation agenda. The leaders of the law school were at the party, and they also were indebted to Leo. He had secured the Scalia family’s blessing and brokered $30 million in donations to rename the school. It is home to the C. Boyden Gray Center for the Study of the Administrative State, named after the George H.W. Bush White House counsel who died this May. Gray was at Leo’s party, too. (A spokesperson for GMU confirmed the details of the week’s events.)