House Minority Leader Nancy Pelosi Nancy PelosiPelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare House lawmakers reach deal to avert shutdown Centrist Democrats 'strongly considering' discharge petition on GOP PPP bill MORE (D-Calif.) ripped 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’s appointment of Matthew Whitaker as acting attorney general, saying in a new interview that his appointment “does violence to the Constitution.”

"It does violence to the Constitution and the vision of our founders to appoint such a person in such a manner to be the chief legal officer in our country. And that's bipartisan," Pelosi told CBS News's Margaret Brennan in an interview set to air Sunday on “Face the Nation.”

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Trump tapped Whitaker to lead the Justice Department after Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE announced Wednesday that he was resigning at the president's request. Whitaker had served as Sessions’s chief of staff since September of last year.

Shortly after Sessions's ouster, Trump also announced that Whitaker would oversee special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's investigation into possible collusion between the Trump campaign and Russia. Deputy Attorney General Rod Rosenstein Rod RosensteinDOJ kept investigators from completing probe of Trump ties to Russia: report Five takeaways from final Senate Intel Russia report FBI officials hid copies of Russia probe documents fearing Trump interference: book MORE had supervised Mueller's probe since Sessions recused himself last year.

Whitaker's ascension to his new role prompted immediate concern among bipartisan lawmakers regarding the fate of Mueller’s investigation.

Whitaker has publicly touted that there was “no collusion” between the Trump campaign and Russia and has denounced the special counsel's investigation as a "witch hunt," adopting the president's own rhetoric.

In May 2017, Whitaker penned an op-ed for The Hill criticizing the idea of appointing a special counsel for its investigation.

“Serious, bipartisan congressional investigations into the Russian allegations have been under way for weeks and they have made progress. Hollow calls for independent prosecutors are just craven attempts to score cheap political points and serve the public in no measurable way,” he wrote.

Pelosi and other Democrats called on Whitaker to recuse himself from overseeing the special counsel in light of the comments.

“Given his record of threats to undermine & weaken the Russia investigation, Matthew Whitaker should recuse himself from any involvement in Mueller’s investigation. Congress must take immediate action to protect the rule of law and integrity of the investigation. #FollowTheFacts,” she tweeted Wednesday.

Pelosi on Wednesday officially launched her bid to become Speaker, following through on her vow to seek to reclaim the Speaker’s chair after an eight-year absence.