Donald Trump has signed the pledge. The Republican presidential front-runner met privately with Republican National Committee Chairman Reince Priebus Thursday afternoon, and soon after, came out to the lobby of Trump Tower to declare that he has signed a loyalty pledge. This means Trump has promised to support the party’s eventual nominee — whoever that may be — and that he will not run as a third-party candidate. “The best way for the Republicans to win is if I win the nomination and go directly against whoever they happen to put up. And for that reason, I have signed the pledge,” Trump said, holding up the paper. “So I will be totally pledging my allegiance to the Republican Party and for the conservative principles for which it stands.” He added: “We will go out and fight hard, and we will win.” Trump has enjoyed a sustained lead in national polls, and the sit-down with Priebus comes amid unease about whether the billionaire businessman would rebuff the party and seek the White House as an independent.