Sen. Elizabeth Warren (D-Mass.) on Wednesday, Feb. 12, accused President Trump and Attorney General William Barr of interfering in Roger Stone’s criminal case and called for Barr to resign or face impeachment.

“Donald Trump can continue his corrupt rampages and vendettas because elected Republicans do nothing. They lack the courage and backbone shown by four career prosecutors who stepped down rather than facilitate the attorney general’s corrupt scheme. But we are not powerless,” 2020 presidential candidate Warren wrote in a tweet.

“Congress must act immediately to rein in our lawless attorney general. Barr should resign or face impeachment,” she added. “And Congress should use spending power to defund the AG’s authority to interfere with anything that affects Trump, his friends, or his elections.”

Federal prosecutors had on Monday recommended a sentence of between seven or nine years in prison for Stone’s conviction on seven counts of obstruction, making false statements to Congress and witness tampering. The charges stemmed from former special counsel Robert Mueller’s Russia investigation. 

However, leaders at the Department of Justice (DOJ) asked a federal court to overrule the prosecutors’ judgment and reduce the sentence for Stone, which led four prosecutors to withdraw from their posts. 

The developments have triggered a political storm in Capitol Hill with Democrats accusing the president of interfering in the process and calling for an investigation. In a series of tweets, Warren cited her plan to create an independent DOJ task force if she’s elected president.

“Trump and Barr’s conduct has no place in our democracy,” she said. “To end it, Congress must act—and the American people must hold them accountable in November.”

President Trump weighed in on the sentencing late Tuesday, calling the recommendation “ridiculous.” The president on Wednesday denied interfering in Stone’s case, calling for the prosecutors to apologize.

“The fact is that Roger Stone was treated horribly and so were many other people,” President Trump said. “Their lives were destroyed.”

“Roger Stone, nobody even knows what he did. … Frankly, they ought to apologize to a lot of people whose lives they’ve ruined,” he added. “Nine years in jail, it’s a disgrace. Meanwhile, [former FBI Director James] Comey walks around getting book deals, the people who launched the investigation.”

“They should go back to school and learn because let me tell you, the way they treated people, no one should be treated that way,” President Trump said of four prosecutors who abruptly resigned in an apparent protest.

The president also sent Barr “Congratulations” for “taking charge of a case that was totally out of control.”

The Justice Department has denied that it communicated with the White House prior to the revised sentencing recommendation’s release and Barr agreed to testify before the House Judiciary Committee next month.

Warren stepped up her attacks on the president as the Massachusetts senator came out in a distant fourth place finish that would not earn her a single delegate in the New Hampshire Democratic primary on Tuesday night.