Trump signs GOP loyalty pledge, nixes 3rd party run 0 By KMAN Staff on September 3, 2015 AssociatedPress Republican presidential candidate Donald Trump holds a signed pledge during a news conference in Trump Tower, Thursday, Sept. 3, 2015 in New York. Trump ruled out the prospect of a third-party White House bid and vowed to support the Republican Party’s nominee, whoever it may be. (AP Photo/Mark Lennihan) Share this:FacebookTwitter