Republican presidential frontrunner Donald Trump would not rule out making a run for president as an Independent despite signing a pledge in September 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.”