Donald Trump says he's going to make a decision once and for all about whether he'll mount a third party bid if he loses the Republican nomination for president. Trump told reporters following a speech in Nashville Saturday that he's going to make a decision "very soon." He says he thinks the decision will make a lot of people "very happy." Trump has so far refused to pledge to support the eventual Republican nominee. He says it gives him leverage. But his hands are largely tied: He'll have to sign a pledge to do so if he wants to appear on the ballot in South Carolina and potentially several other states. Trump was courting tea party voters at a conference hosted by the National Federation of Republican Assemblies.