Republican presidential candidate Donald Trump on Wednesday night lashed out at Fox News anchor Megyn Kelly in his first appearance on the network since he announced he'd boycott the next GOP debate.

He also refused to reconsider his decision to sit out the network's Thursday night debate – the last before the Iowa caucuses in five days – and said he'd move forward with his own competing event to raise money for wounded veterans.

Speaking on "The O'Reilly Factor," Trump continued his long-running feud with Kelly, who he has been criticizing ever since she challenged him on his past derogatory remarks about women at the first GOP debate in August.