Donald Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE is still flirting with a third-party campaign days after meeting with the chair of the RNC.

"It's not that simple," Trump said in an interview on "Fox News Sunday" when asked if he would rule out a third-party run. "I’m by far the front-runner as a Republican. I want to run as a Republican. I will beat Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE."

When host Chris Wallace asked what he would do if he didn't get the nomination, Trump responded: "We’re going to have to see how I was treated. I'm going to have to see how I was treated, very simple."

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Trump has previously toyed with the idea of a third-party bid, but later committed to the GOP by signing a loyalty pledge to support the eventual nominee.

However, Trump, along with Ted Cruz Rafael (Ted) Edward CruzLoeffler calls for hearing in wake of Netflix's 'Cuties' Health care in the crosshairs with new Trump Supreme Court list 'Parks and Rec' cast members hosting special reunion to raise money for Wisconsin Democrats MORE and John Kasich, has been backing away from that promise.

Trump met with RNC Chairman Reince Priebus this week. After the meeting, Trump said on Fox's "The O'Reilly Factor": "I think they wanted to really discuss unity, and I like discussing unity, too."

Priebus has said he's not worried about the party coming together after the convention this summer.

The full interview is set to air on Fox News at 10 a.m. Sunday.