WASHINGTON - US Republican presidential candidate Donald Trump on Wednesday taunted Fox News, and anchor woman 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. "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 Feb. 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 Nov. 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.