Republican candidates for president should pledge not to run as a third-party candidate, Republican National Committee Chairman Reince Priebus said Monday.

The remarks come days after current GOP front-runner Donald Trump hinted that he might pursue a third-party bid if the national committee treats him poorly during the primary process. In subsequent interviews, Trump has said the party has treated him well.

“Certainly, I think our candidates should pledge not to run as a third-party candidate. I don’t see that happening. I think everyone understands that if Hillary Clinton’s going to get beat, she’s going to get beat by a Republican. And most people that run for president run to win, and if our candidates want to win, then they’ll have to run as a Republican,” Priebus told NBC News’ Savannah Guthrie in a Monday interview on “Today.”