Donald Trump made a splashy visit Thursday to the U.S.-Mexico border in a bid to draw attention to illegal immigration. But on the sidelines, he was making news for other reasons -- his threat to mount an independent run for the White House if the Republican Party won't welcome him. The warning, made in an interview with The Hill, comes as Trump faces some of the toughest criticism yet from fellow Republican candidates. Trump said the Republican National Committee "has not been supportive," and suggested if he does not clinch the nomination and is not "treated" well by Republicans, he'd consider an independent bid. Asked about the remarks Thursday during his border visit, Trump did not rule out an independent run but said: "I want to run as a Republican. ... I think I'll get the nomination." Read more http://www.foxnews.com/politics/2015/07/23/border-patrol-union-pulls-out-trump-meeting/