ABC News noted last month that in order to participate in officially sanctioned debates, Republican presidential candidates had to pledge support for whoever the GOP ultimately nominates.

Among those who signed up was former New Jersey Gov. Chris Christie. Yet according to Breitbart, Christ just announced that he is quitting the promise. 

Christie will not back Trump

Under the agreement, each candidate affirms "that if I do not win the 2024 Republican nomination for President of the United States, I will honor the will of the primary voters and support the Republican presidential nominee in order to save our country and beat Joe Biden."

See you in Milwaukee! pic.twitter.com/zFeGjrtLph

— Team DeSantis (@TeamDeSantis) August 9, 2023

The candidate must "further pledge that I will not seek to run as an independent or write-in candidate nor will I seek or accept the nomination for president of any other party."

However, Christie told MSNBC host Mike Barnicle on Wednesday that he would not honor his pledge to the Republican National Committee (RNC) if former President Donald Trump is nominated.

Trump is considered to be the Republican Party's strongest contender, with most polls showing him as having more support than all other candidates combined.

Former governor regrets his 2016 endorsement

Breitbart noted that Christie's statement to Barnicle is in line with comments he previously made to Axios about Trump, saying, "I can't help him. No way. Look, I just can't."

What's more, the former New Jersey governor released a campaign ad on Thursday in which he expressed regret for endorsing Trump in 2016.

"Eight years ago when I decided to endorse Donald Trump for president, I did it because he was winning, and I did it because I thought I could make him a better candidate and a better president," Christie told his viewers.

"Well, I was wrong, I made a mistake," the candidate continued before dismissing suggestions that he should drop out of the race.

Christie says it is "crazy" to suggest that he will drop out

Politico also reported that Christie reacted angrily to New Hampshire Gov. Chris Sununu's suggestion this past weekend that his campaign is "at an absolute dead end."

"That’s when you know, in politics, when someone is going to knife you in the back, is when they start off with, 'Oh he’s my good friend,'" Politico quoted Christie as telling MSNBC's Morning Joe.

"I remember when Chris used to care about Donald Trump. He’s the guy who came, I think to the Gridiron Club, and said that Trump belongs in a mental institution," the former governor recalled.

"And now he’s saying that he’d vote for him if he were the nominee," Christie said before declaring, "Anybody [who] thinks I’m getting out of this race, they're crazy."