President Trump secured the Republican presidential nomination on May 3, 2016, when he crushed a final “Never Trump” effort to stop him in the Indiana primary. At the GOP Data Trust, a voter outreach organization based in Washington, the mood was bleak. It was clear Trump was heading for a blowout victory. When Trump had delivered his victory speech shortly after 9 p.m., Data Trust staffer Courtney Mullen invited her colleagues to attend an “end of the world” happy hour to mark Trump’s triumph, which the party establishment had watched in horror.