ABC News November 22, 2015

Donald Trump Isn't Ruling Out Independent Run

WATCH: Donald Trump on 2016 Presidential Race

Republican presidential frontrunner Donald Trump would not rule out making a run for president as an independent despite signing a pledge over the summer saying he would support the eventual GOP nominee instead of running a third-party bid.

“I’m going to have to see what happens. I will see what happens. I have to be treated fairly,” Trump said Sunday on ABC’s “This Week” when asked about a new guerrilla effort by operatives within the Republican Party to derail Trump’s candidacy. “When I did this, I said I have to be treated fairly. If I’m treated fairly, I’m fine. All I want to do is [have] a level playing field."

Trump has previously cited "fairness" as a reason he would run a third-party bid. In September, when he signed the pledge, he said he gained nothing besides "assurance that I’ll be treated fairly.”

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Trump pointed out that he’s currently content with his position in the polls.

“I’m leading every poll by a lot,” Trump said. “It’s not even a little bit anymore -- it’s a lot.”

Trump also targeted Hillary Clinton, a potential rival in the general election, saying she didn't "have the strength or the stamina" to be president.

"She's not a strong enough person to be president," he said.