REUTERS/Darren Hauck
Donald Trump.
Trump shared a Twitter poll with his followers asking if he should participate in the debate - considering that Fox News anchor Megyn Kelly will be one of the moderators.
In a corresponding Instagram video, Trump reiterated his criticism of Kelly's supposed bias against him.
"Megyn Kelly is really biased against me. She knows that, I know that, everybody knows that," Trump said. "Do you really think that she could be fair at a debate?"
Trump has participated in an on-again, off-again feud with Fox News and Kelly after she asked him a pointed question during the first GOP debate in August about his past comments directed at women. Trump suggested in a CNN interview Monday that he was unsure whether he would participate.
"I don't think she can treat me fairly, actually. I think she's very biased. And I don't think she can treat me fairly. But that doesn't mean I don't do the debates. I like doing the debate. I've won every single debate, according to every poll," he said.
Fox has defended Kelly. A network representative told Business Insider in a statement Monday that the network was "surprised" that the outspoken Republican front-runner appeared threatened by Kelly.
"Sooner or later Donald Trump, even if he's president, is going to have to learn that he doesn't get to pick the journalists - we're very surprised he's willing to show that much fear about being questioned by Megyn Kelly," the Fox representative told Business Insider in a statement.
As of press time, a slim majority of voters in the Twitter poll - 51% - said he should participate.
Colin Campbell contributed reporting.