Whitaker's exchanges with House Democrats sometimes got heated.
Whitaker testified following a lengthy fight with Nadler over the prospect that he would be subpoenaed for not answering questions.
The setup for Whitaker's hearing was fairly typical: Committee members did the asking in five-minute increments.
During his tenure, he added, the department has "complied with special counsel regulations and there has been no change in how the department has worked with the special counsel's office". Jerrold Nadler's (D-N.Y.) line of questioning. "I have not interfered in any way with the special counsel's investigation". The Democrats originally launched probes that ended a year ago. "There has been no decision that has required me to take any action, and I have not interfered with the special counsel's investigation in any way". "Stone's indictment or his arrest".
Moscow has rejected U.S. intelligence findings that the Kremlin meddled in the 2016 presidential campaign, and Mr Trump has repeatedly denied any campaign collusion with Russian Federation.
Whitaker infuriated Democrats by not giving "yes" or "no" answers, referring them to other departments such as the Department of Homeland Security (DHS), and at times challenging their questions.
Whitaker then said he would not answer questions based on representatives' "speculation". Trading Whitaker in for him will be one of the Trump presidency's rare blessings. Whitaker responded by saying that he would not come unless the committee dropped its subpoena threat, which he called an act of "political theater".
"I'm thinking maybe we just set up a popcorn machine in the back", said Doug Collins of Georgia, the top Republican on the House judiciary committee. He suggested that the hearing was a waste of time because Whitaker likely only has a few more days on the job.
The hearing took place as Trump's nomination of former Attorney General William Barr is making its way through the Senate.
In response, the chairman told the room: "I will point out that we didn't enforce the five-minute rule on acting Attorney General Whitaker".
'In your capacity as acting attorney general, have you ever been asked to approve any action or request to be taken by the special counsel?' he asked. Jeffries asked "how the heck" he became acting attorney general. Rosenstein is expected to step down in coming months.
"I'm not kidding when I say I have interviewed terrorists who are more cooperative and respectful than Matt Whitaker was today", Figliuzzi began, provoking laughter from MSNBC host Nicole Wallace.
Whitaker's highly anticipated testimony Friday had been in limbo after the Democratic-led committee approved a tentative subpoena to ensure that he appeared and answered questions.
When Nadler kept pressing him on the same matter, that's when things got entertaining and when Whitaker started snapping back with some fresh quips.