In her tweet, Pelosi, who is likely to become House speaker under the new Democratic-controlled Congress, wrote that "It is impossible to read Attorney General Sessions' firing as anything other than another blatant attempt by Donald Trump to undermine & end Special Counsel Mueller's investigation".
As for the reports on Trump, if Whitaker suppresses them, the House Judiciary Committee could subpoena them and make them public.
Probably. Mueller has clearly pursued allegations that Trump criminally obstructed the Russian Federation probe, mainly by firing former Federal Bureau of Investigation chief James Comey in May 2017 - the move that led directly to Mueller's appointment.
"Under these conditions, it would be wholly inappropriate for Mr. Whitaker to supervise the Special Counsel investigation given his documented history of opposition to it", Nadler said, before warning that the Sessions firing would be investigated and warning that documents related to the event must be preserved.
"So I could see a scenario where Jeff Sessions is replaced with a recess appointment and that attorney general doesn't fire Bob Mueller, but he just reduces his budget to so low that his investigation grinds to nearly a halt", Whitaker said during an interview with CNN in July 2017.
Asked whether Whitaker would take control of the Russian Federation probe, Justice Department spokeswoman Sarah Isgur Flores said, "The acting attorney general is in charge of all matters under the purview of the Department of Justice".
In a CNN op-ed a year ago, Whitaker wrote, "Mueller has come up to a red line in the Russian Federation 2016 election-meddling investigation that he is dangerously close to crossing".
Asked if that would be to dwindle the special counsel's resources, Whitaker responded, "Right".
He was the co-chairman of former Texas Gov. Rick Perry's 2012 Iowa campaign for president, and campaigned himself for the Senate seat opened by the retirement of Democrat Tom Harkin.
The Fight for the Senate, 2018: The Results As They Come In
The current session comprises 235 Republicans, 193 Democrats and seven vacant seats (five of which were last held by Republicans). Ted Cruz (R-Texas) and Democratic challenger Beto O'Rourke tipping toward Cruz, according to NBC News and the Associated Press .
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Roberto Firmino says Liverpool have the strength in depth to challenge Manchester City for silverware this season. But the atmosphere after the second goal especially, in the whole club, if you want, they could now smell it.
Trump Mocks GOP Losers Who Kept Their Distance from Him
He reiterated that he was reviewing Interior Secretary Ryan Zinke job as well, following numerous reports of ethical violations. Trump said that he was considering changes to his administration in the aftermath of the election, including to his cabinet.
Republican Sen. Susan Collins also voiced concern about the move, tweeting on Wednesday that "Special Counsel Mueller must be allowed to complete his work without interference - regardless of who is AG".
The decision infuriated Trump, who repeatedly lamented that he would have never selected Sessions if he had known the attorney general would recuse. Mueller's team also has been pressing for an interview with Trump.
"It's very significant because Whitaker's position on indictments or future indictments may be different than Rosenstein's, and Rosenstein had given Mueller a broad mandate to pursue various crimes", said Washington criminal defense lawyer Jeffrey Jacobovitz.
Sessions endured most of the name-calling in silence, though he did issue two public statements defending the department, including one in which he said he would serve "with integrity and honor" for as long as he was in the job.
A copy of Attorney General Jeff Sessions' resignation letter is photographed in Washington on an image of the exterior of the Justice Department. He recused himself the next day, saying it would be inappropriate to oversee an investigation into a campaign he was part of.
"If the Democrats think they are going to waste Taxpayer Money investigating us at the House level, then we will likewise be forced to consider investigating them for all of the leaks of Classified Information, and much else, at the Senate level".
The Democrats, who won the House in the mid-terms, have vowed to protect it.
"Why is the President making this change and who has authority over Special Counsel Mueller's investigation?"