Moments after Fox News announced the lineup for Thursday's Republican debate, Donald J. Trump said Tuesday it was pretty "irrevocable" that he would skip the event, which takes place just days before the Iowa caucuses.
"Let's see how much money Fox is going to make on the debate without me," Mr. Trump said at a news conference here, where he continued to attack Megyn Kelly and the crew at Fox News, with whom he sparred at an earlier debate.
"It's time that somebody plays grown-up," he said.
Just after Mr. Trump started speaking, his campaign manager, Corey Lewandowski, confirmed that he would skip Thursday's event, saying, "He will not be participating in the Fox News debate on Thursday" and that "it's not under negotiation."
Mr. Trump's absence would leave the main debate stage without the candidate who leads in national polls, one who has been a big ratings draw for past debates. Mr. Trump has threatened in the past to skip debates, but his remarks Tuesday night were his strongest statement yet that he would not participate.
Officials at Fox News did not immediately respond to requests for comment.