US Republican presidential candidate Donald Trump has taunted Fox News, and anchor Megyn Kelly in particular, a day after pulling out of a televised debate with party rivals this week over anger at the network.
"I refuse to call Megyn Kelly a bimbo, because that would not be politically correct," Trump said on Twitter on Wednesday. "Instead I will only call her a lightweight reporter!"
On Tuesday, Trump said he would not participate in the debate, scheduled for Thursday in Des Moines, Iowa, expressing irritation at Fox for allowing Kelly to moderate after her questioning angered him in a debate last year.
His withdrawal means the last televised debate before Iowa's pivotal February 1 nominating contest will not have the party's front-runner in a close state race.
Iowa's caucuses are the first nominating contest to choose the Republican presidential nominee for the November 8 election.
Trump has been feuding with Fox News since the network put on the first debate in August, when Kelly asked Trump about his treatment of women, prompting a stream of insults from the candidate and complaints of not being treated fairly.
His Republican rivals have criticised him for dropping out while his closest rival in Iowa, US Senator Ted Cruz of Texas, challenged him to a one-on-one debate.
In a Twitter post, Cruz likened Trump's withdrawal to a comical retreat from a Monty Python movie.
Former Arkansas Governor Mike Huckabee on Fox News program, Fox and Friends on Wednesday called the affair "a lot of drama" that most Iowa caucus-goers would likely tune out.
In a separate interview on Fox, retired neurosurgeon Ben Carson said it was time to "stop worrying about personalities and start worrying about solutions."
Trump campaign manager Corey Lewandowski told several television programs yesterday that Trump was not afraid to debate his rivals or take reporters' questions.
He added that Trump would be happy to debate Cruz if the contest, which includes 12 Republicans vying for the nomination, narrows.
"If it comes down to a two-person race, Donald Trump would be happy to debate him," he told ABC's Good Morning America program.