Former Vice President and 2020 presidential hopeful Joe Biden accused President Donald Trump Thursday of ‘weaponizing’ the Department of Justice, he said on The View.

“He goes out and he basically reduces a sentence for a guy that was testifying against his campaign. I mean, he’s weaponized… the Attorney General’s office. It’s a weapon now,” Biden said.

Joe Biden tells @TheView that Pres. Trump "has weaponized" the Attorney General's office. Asked if Trump "learned a lesson" from impeachment, Biden says, "Yeah, he's learned a lesson. He learned how to make it work even worse!" https://t.co/2Y3udLFCSB pic.twitter.com/HusYe7uHDx — The View (@TheView) February 13, 2020

Sen. Susan Collins, R-ME, was a key swing vote in the President’s acquittal in the Senate last week. In justifying her vote, Sen. Collins said she believed President Trump had done “wrong”, but in the end, she said he’d learned a “pretty big lesson.”

When asked about Collins’ explanation, Biden remarked, “Well, yeah, he’s learned a lesson. He’s learned how to make it work even worse.”

On Wednesday, House Judiciary Committee Chairman Jerrold Nadler (D-NY) announced that Attorney General William Barr will testify before the committee on March, 31.

In his letter, signed by twenty-three other Democrats on the committee, Nadler alleges that AG Barr “engaged in a pattern of conduct in legal matters relating to the President that raises significant concerns for this Committee.”

The letter cites three instances from just this week that “raises significant concerns” for the committee about Barr’s work at the Justice Department.

The letter states:

The ongoing developments following the removal of U.S. Attorney Jessie Liu, who oversaw the prosecutions of President Trump’s deputy campaign chairman Rick Gates, President Trump’s former national security advisor Michael Flynn, and President Trump’s longtime political adviser Roger Stone.[4]

The creation of a new “process” by which President Trump’s personal attorney Rudy Giuliani can feed the Department of Justice information, through you, about the President’s political rivals.[5]

The decision to overrule your career prosecutors and significantly reduce the recommended sentence for Roger Stone, who has been convicted for lying under oath, at the apparent request of the President — a decision that led to all four prosecutors handling the case to withdraw from the proceedings in protest.[6]

One GOP official criticized the move Wednesday, telling this reporter that the timing of the letter is suspect.

“It’s only fitting that the day Attorney General Barr is scheduled to testify, is the same day that the Supreme Court will hear arguments over access to the President’s financial records.” a GOP official told this reporter, “It just goes to show you that although impeachment is over, the attacks against the President just will not stop.”

EXCLUSIVE: Attorney Gen. Bill Barr tells @PierreTABC “the president has never asked me to do anything in a criminal case”—but should stop tweeting about the DOJ because his tweets “make it impossible for me to do my job.” https://t.co/ohLk7JTpRs pic.twitter.com/Lac2RkzMYq — ABC News Politics (@ABCPolitics) February 13, 2020

In an exclusive interview with ABC News Thursday, AG Barr said the President “has never asked me to do anything in a criminal case”, adding that his Tweets about the Justice Department “make it impossible for me to do my job.”