Just days after GOP presidential front-runner Donald Trump met with Republican National Committee (RNC) Chairman Reince Priebus behind closed doors, rhetoric was harsh Sunday as Trump again raised the possibility of a third-party run and Priebus warned that candidates need to watch what they say.br br Trump, on “Fox News Sunday,” said he wouldn’t rule out a run as a third-party candidate if he doesn’t get the GOP nomination.br br “It’s not a question of win or lose; it’s a question of treatment,” Trump said. “I’m by far the front-runner. I want to run as a Republican. … [But] I’m going to have to see how I was treated.