Former senior FBI official Chuck Rosenberg ripped Acting Attorney General Matt WhitakerMatthew G WhitakerEx-federal prosecutor: 'Thank God' Whitaker is gone, Barr will bring 'integrity' back to DOJ GOP pollster says Dems are relitigating 2016 election with investigations of Trump Former senior FBI official calls Whitaker hearing ‘disgraceful’ MORE on Friday night, calling his testimony in front of the House Judiciary Committee “disgraceful.”

"I’ve testified many times in Congress," Rosenberg, who served as chief of staff under former FBI Director James ComeyJames Brien ComeyBiden is the least electable candidate — here's why Top Mueller prosecutor Andrew Weissmann lands book deal Trump to appear on 'Meet the Press' for first time as president MORE and as a U.S. attorney in the Bush administration, explained during an interview on MSBNC.

"Sometimes the questions are good and thoughtful, sometimes they’re compound and incomprehensible, but you have to answer every one with a degree of civility and dignity, and that was sorely lacking.”

Whitaker sparred with various lawmakers during his appearance before the Judiciary panel on Friday, with Democrats peppering him with questions for hours and blasting his responses to certain questions.

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At one point, the Trump administration official shocked committee members and spectators alike after he told Judiciary Chairman Jerry NadlerJerrold (Jerry) Lewis NadlerNadler apologized after repeatedly calling Hope Hicks 'Ms. Lewandowski' at hearing Hope Hicks: Trump campaign felt 'relief' after WikiLeaks released damaging info about Hillary Clinton House hearing marks historic moment for slavery reparations debate MORE (D-N.Y.) that his time for questioning had run out.

“Mr. Chairman, I see that your five minutes is up,” Whitaker said, drawing gasps from the panel and a packed crowd.

“I am here voluntarily. We have agreed to five-minute rounds,” he added.

Lawmakers routinely go over their five-minute time limits for questioning, and it is particularly rare for a witness to accuse the chairman of a panel of having gone over his time limit.

“The committee will come to order. I will point out we didn't enforce the five-minute rule on acting Attorney General Whitaker,” Nadler responded.

During the hearing, Whitaker also said he had not interfered in special counsel Robert MuellerRobert (Bob) Swan MuellerTop Republican considered Mueller subpoena to box in Democrats Kamala Harris says her Justice Dept would have 'no choice' but to prosecute Trump for obstruction Dem committees win new powers to investigate Trump MORE’s probe into possible collusion between the Trump campaign and Moscow in 2016. 

Rosenberg has emerged as a staunch critic of the Trump administration, often appearing on cable news to denounce what he says is the president’s mistreatment of the Justice Department.