Reuters cited a source which confirmed the Post report, adding that an examination of possible obstruction of justice charges was "unavoidable" after former FBI Director James Comey told Congress he believed he was sacked by Trump to undermine the agency's Russian Federation investigation. It was unclear whether his tweet about being under investigation was based on direct knowledge or new media reports that suggest Mueller is examining whether the president obstructed justice by firing Comey.
"Americans should exercise caution before accepting as true any stories attributed to anonymous 'officials, ' particularly when they do not identify the country - let alone the branch or agency of government - with which the alleged sources supposedly are affiliated", read the statement from Deputy Attorney General Rod Rosenstein.
Comey admitted under oath that he leaked a memo from a meeting with Trump through a friend to The New York Times, and did this with the intention of having a special counsel assigned to the Russian Federation investigation.
Mueller's investigators have asked for information and will talk to Director of National Intelligence Dan Coats and National Security Agency Director Adm. Mike Rogers, a source familiar with the matter told CNN.
A Washington Post report that special counsel Robert Mueller is looking at Jared Kushner's finances cited anonymous sources, but described them as us officials. "Nice", Trump tweeted, later repeating his accusation that the probe is a "witch hunt". But Rosenstein, too, may ultimately have to hand off oversight of the probe given his own role in Comey's firing. Last year, Democrats aggressively attacked Comey for his handling of the Hillary Clinton email investigation, with many calling for his firing. The official demanded anonymity because the official was not authorized to be named discussing the deliberations.
Several congressional panels are also investigating the Russian Federation issue, which has cast a shadow over the early months of Trump's presidency.
And as Rep. Ted Lieu (D-Calif.) declared in a tweet Thursday, "If Trump fired Mueller (he'd also have to fire Dep AG Rosenstein), it would be an 11 on the Richter scale of #obstructionofjustice".
The White House has directed questions for details to outside legal counsel, which has not responded.
Pence had taken over the transition team from New Jersey Governor Chris Christie. The order also covers separate inquiries into several key Trump associates including former National Security Adviser Michael Flynn, campaign adviser Paul Manafort, foreign policy aide Carter Page and outside adviser Roger Stone.
"Why is that Hillary Clintons family and Dems dealings with Russian Federation are not looked at, but my non-dealings are?" he asked at one point.
Now that Trump is president and Comey has emerged as a top Trump antagonist, some former Comey critics see his willingness to go after the leaders of both political parties as proof of his independence. An hour later he added: "You are witnessing the single greatest WITCH HUNT in American political history - led by some very bad and conflicted people!"