"Under Acting Attorney General Matthew Whitaker, it is imperative that the important work of the Justice Department continues, and that the Mueller investigation proceeds to its conclusion unimpeded", he said on Twitter.
Lamar Alexander, Republican senator for Tennessee, also issued a warning from the Republican side, saying that the Senate will not confirm a successor to Sessions who would stop the Russian Federation investigation. "But, No. 2, our paramount view is that any attorney general, whether this one or another one, should not be able to interfere with the Mueller investigation in any way".
The Justice Department has declined to answer whether ethics officials have been asked to review if Whitaker should recuse himself from the Mueller probe.
When Democrats assume control of House committees next year, they will direct everything from the subject matter of investigations to the timing and substance of committee hearings. However, now that Sessions is gone, his acting replacement Matt Whitaker will oversee the investigation.
No decisions are expected soon, and the list of those being considered - which also includes Rudy Giuliani, outgoing Florida Attorney General Pam Bondi, and former Attorney General William Barr, who served under President George H.W. Bush - is likely to grow in the coming days, CBS News chief White House correspondent Major Garrett reports.
Top Democrats on multiple committees wrote to key Trump administration officials Wednesday night informing them that committees will be investigating Sessions' departure. The group also urged people to pressure Congress to protect the Mueller investigation. Whitaker, a former Republican politician, has publicly called for limits on the Mueller probe.
Whitaker, according to sources, is now overseeing everything at the Justice Department, including the Russian Federation investigation - despite calls from Democrats to recuse himself.
The Washington Post reported that Whitaker has no intention of recusing himself, following howls from Democrats about his past statements on the special counsel.
And since Sessions technically resigned instead of forcing the White House to fire him, he opened the door under federal law to allowing the president to choose his successor instead of simply elevating Rosenstein, said University of Texas law professor Stephen Vladeck.
Separately, Justice Department prosecutors in NY secured a guilty plea from Trump's former personal lawyer, Michael Cohen, who said the president directed him to arrange hush money payments before the 2016 election to two women who said they had sex with Trump.
Trump's running commentary criticizing Sessions and the Justice Department injected more turmoil into an agency that was still reeling from the president's firing of FBI Director James Comey in May 2017.
One reason Sessions endured months of taunting from Trump is that he believed he was protecting the integrity of the Justice Department and was trying to prevent the president from bringing in someone who would politicize it, according to a USA official who has worked with Sessions and frequently talked with him.
Russian Federation denies meddling in the election, and Trump denies any "collusion" with Russian Federation.
Uganda steps up Ebola vaccinations
The districts targeted in the current vaccination phase are Bundibugyo, Kabarole, Kasese, Ntoroko and Bunyangabu. He assured them about its potency and ability to protect them effectively.