"Fox & Friends" host Brian Kilmeade on Tuesday criticized White House adviser and President TrumpDonald John TrumpElizabeth Warren after TMZ catches her sprinting to catch train: 'Try and keep up' GOP governor criticizes Trump's 'dangerous rhetoric' about the media Trump Jr.: Obama, Bush 'couldn't have done' what my father's done for the American people MORE's son-in-law Jared KushnerJared Corey KushnerTrump delaying rollout of Mideast peace plan until after Israeli elections: report Jordan: Mueller report should end congressional investigations into Trump Fox's Chris Wallace challenges Nadler on whether no more indictments means no 'criminal collusion' MORE, arguing that Kushner harmed the administration with his efforts to block former New Jersey Gov. Chris Christie (R) from joining the administration.

During an interview with Christie, Kilmeade argued that it was "hard not to conclude" that the governor's exclusion from the Trump administration had harmed the first two years of Trump's term.

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Kushner has been rumored to have battled Christie's potential nomination as attorney general due to a grudge centered around Christie's past prosecution of Kushner's father.

"I could have prosecuted this case," Kilmeade said, referring to the conviction of Kushner's father in 2005 on charges of illegal campaign contributions, tax evasion and witness tampering.

"You could have," Christie responded, laughing.

"This is not your fault, and it's amazing that he never let it go and, in the end, I think it's hard not to conclude he hurt the president's first two years," Kilmeade said.

Kilmeade's comments come after Christie made accusations in a new book published this month that Kushner carried out a political "hit job" to derail the former governor's appointment to a position within the Trump administration after Trump's defeat of Hillary ClintonHillary Diane Rodham ClintonGraham: McCain 'acted appropriately' by handing Steele dossier to FBI Why Mueller's hedge on obstruction decision was a mistake Giuliani says news media treat Dems better than GOP MORE in the 2016 election.

"[Kushner] implied I had acted unethically and inappropriately but didn’t state one fact to back that up,” Christie writes in the book, according to excerpts published by The Guardian. “Just a lot of feelings — very raw feelings that had been simmering for a dozen years.”

“[Former White House chief strategist] Steve BannonStephen (Steve) Kevin BannonFilmmaker behind Bannon doc says the movie a 'damning portrayal' Avoiding the tragedy of Brexit Bannon predicts 2019 will be 'most vitriolic year' in US politics 'since before the Civil War' MORE ... made clear to me that one person and one person only was responsible for the faceless execution that Steve was now attempting to carry out," he continued in the book, writing of his firing from the transition team. "Jared Kushner, still apparently seething over events that had occurred a decade ago."