Republican National Committee Chairman Reince Priebus said on Friday that he doesn’t believe Donald Trump will follow through on his threat to run as a third-party candidate in the presidential race.

“I don’t think he’s going to do that. I think he knows that if you’re going to beat Hillary Clinton — if Hillary Clinton is going to get beat, there’s only one party that’s going to beat her: It’s the Republican Party,” Priebus told Fox News’ Greta Van Susteren, according to The Hill.

Trump indicated on Wednesday that he may consider running as a third-party candidate if he is treated poorly by the Republican party.

“The RNC has not been supportive. They were always supportive when I was a contributor. I was their fair-haired boy,” he told The Hill. “The RNC has been, I think, very foolish.”

The real estate mogul has been at odds with the Republican party over some of his more inflammatory remarks.

After Trump called Mexican immigrants “rapists,” Priebus called Trump, reportedly asking the candidate to tone down his rhetoric. And following Trump’s comment that Sen. John McCain (R-AZ) is only considered a war hero because he was captured, the RNC denounced Trump’s statement.