The "Saturday Night Massacre" was one of the most dramatic events in the Watergate scandal in the 1970s, which led to the resignation of President Richard Nixon.
If Sessions' departure was an "opening move" by Trump to meddle in Mueller's investigation, Hoyer said in a statement, "the president must be held accountable".
Clovis, the 2016 Trump campaign national co-chairman, said in a May radio interview that he has been interviewed by the special counsel's team and had testified before the Mueller grand jury.
"Based on my experience with Matt", said John Richter, a former U.S. Attorney in Oklahoma and high-ranking Bush administration Justice Department official, "I think he will act consistently with the best traditions of the department and call things as he sees them".
Deputy Attorney General Rod Rosenstein took over supervision of the Russian Federation investigation.
Trump blamed the recusal for the appointment of Mueller, who took over the Russian Federation investigation two months later and began examining whether Trump's hectoring of Sessions was part of a broader effort to obstruct the probe.
One is simply by declining to continue to pay the investigators or attorneys working for the special counsel.
While speaking to reporters on Wednesday, Conway explained President Trump is not planning to use the resignation as a way to shut down the Mueller probe.
Activists are demanding that Whitaker recuse himself from managing the investigation as well, saying he has his conflicts of interest.
The decision infuriated Trump, who repeatedly lamented that he would have never selected Sessions if he had known the attorney general would recuse.
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"In my time as Attorney General we have restored and upheld the rule of law", Sessions said in the letter addressed to Trump.
The deteriorating relationship became a soap opera stalemate for the administration.
Trump asserted that again on Wednesday in a press conference at the White House in which he suggested the only reason he hasn't already ousted Mueller is because it might make him look bad.
"He is the acting attorney general". A logjam broke when Republican senators who had publicly backed Sessions began signaling a willingness to consider a new attorney general.
In that scenario, Mueller's budget could be reduced "so low that his investigation grinds to nearly a halt", Whitaker said during an interview with CNN in July 2017 before he joined the Justice Department.
The recusal from the Russian Federation investigation allowed him to pursue the conservative issues he had long championed as a senator, often in isolation among fellow Republicans.
He found satisfaction in being able to reverse Obama-era policies that conservatives say flouted the will of Congress, encouraging prosecutors to pursue the most serious charges they could and promoting more aggressive enforcement of federal marijuana law.
The Democrats, who won the House in the mid-terms, have vowed to protect it.
Whitaker's views as an outside commentator before joining the government have been music to the ears of Trump and Republicans.
Sessions, for instance, directed senior prosecutors to examine potential corruption in a uranium field transaction that some Republicans have said may have implicated Clinton in wrongdoing and benefited donors of the Clinton Foundation. Chuck Schumer, said he should recuse himself because of his comments on the probe. Rep. Sessions rejected the entreaty.
Now Whitaker is in charge of the Justice Department and Rosenstein reports to him, putting Whitaker in a position to constrain the special counsel if he wishes or if he's directed to do so by the president.