In news from the campaign trail, Republican presidential contender Donald Trump has signed a pledge saying he will back the eventual Republican party nominee, ruling out the possibility of a third-party run if he does not gain the nomination. His announcement came after a meeting with the chairman of the Republican National Committee, which has been requesting all Republican candidates sign the agreement. Trump had resisted the pledge. During the first Republican presidential debate, he raised his hand when Fox News moderators asked whether the candidates would consider mounting a third-party run. In his announcement Thursday, Trump said, “What did I get from signing the pledge? Absolutely nothing, other than the assurance that I would be treated fairly.”