None of the Republicans on the House Oversight and Reform Committee are defending President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE over the “substance” of former Trump lawyer Michael Cohen’s testimony, former New Jersey Gov. Chris Christie (R) said Wednesday.

“The interesting thing is that there hasn’t been one Republican yet who has tried to defend the president on the substance, and I think that’s something that should be concerning to the White House,” Christie said during an ABC panel.

“Why are no Republicans standing up and defending the president on the substance?” he added.

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Christie, a former ally of Trump's who recently wrote a book that includes some criticisms of the president, criticized the White House and GOP lawmakers for not having a unified strategy to refute Cohen’s allegations.

"And so I think it’s going to, as the day goes on, it’s going to get tired of hearing the attacks on Cohen’s credibility,” Christie added. “He’s not a credible witness, but he does have corroboration on certain things. Where is the defense of the president?”

Chris Christie on Michael Cohen testimony: "There hasn't been one Republican yet who's tried to defend the president on the substance. I think that's something that should be concerning to the White House." https://t.co/ij0AmYP27T pic.twitter.com/0Zgubp7t5d — This Week (@ThisWeekABC) February 27, 2019

Cohen testified on Wednesday that he paid two women on behalf of Trump to keep their allegations of affairs with his former boss quiet, and that Trump knew ahead of time that WikiLeaks would be releasing emails that had been stolen from the Democratic National Committee.

GOP lawmakers hammered Cohen on his credibility and tried to depict him as a hypocrite and a liar. They pointed to his previous statements and actions defending his ex-boss and his conviction for lying to another congressional committee.