Trump confirms he's under investigation for firing former FBI Director James Comey

US President Donald Trump continued to attack Democrats and the media as he comes under investigation for possible

Mueller is also investigating Trump for obstruction of justice, the Post reported Wednesday. He lashed out at a top Justice Department official overseeing the inquiry, reflecting his mounting frustration with the unrelenting controversy that has consumed his early presidency.

Sen. Richard Burr, R-N.C., right, chairman of the Senate Select Committee on Intelligence, and Vice Chairman Mark Warner, D-Va., left, listen as Attorney General Jeff Sessions testifies before the Senate Select Committee on Intelligence about his role in the firing of FBI Director James Comey and the investigation into contacts between Trump campaign associates and Russian Federation, on Capitol Hill in Washington, Tuesday, June 13, 2017. That, not a political witch hunt, is what the nation needs.

Mueller's fate "rests exclusively" with Deputy Attorney General Rod Rosenstein, Starr said. A new poll shows just one in five support his decision to oust James Comey from the Federal Bureau of Investigation.

Friday's tweets are the latest in a week of angry social media responses by the president over a report by The Washington Post that Mueller was looking into whether Trump obstructed justice. He said the president "sought my advice and input" on Comey's firing.

Aides have counseled the president to stay off Twitter and focus on other aspects of his job. "Nice", Trump wrote in his first tweet.

The president has denied that he has any nefarious ties to Russian Federation and has also disputed that he's attempted to block the investigation into his campaign's possible role in Russia's election-related hacking.

"Americans should be skeptical about anonymous allegations", Rosenstein said. "The Department of Justice has a long-established policy to neither confirm nor deny such allegations".

"He's driving this", the White House official said, speaking on condition of anonymity to discuss West Wing internal deliberations.

The memo sent Thursday asks for records related to foreign travel, contacts with Russian "officials, agents or nationals" and background investigations into the top Trump associates now targeted by Mueller's probe.

President Donald Trump in the Rose Garden of the White House in June.

The legal problems keep piling up for Attorney General Jeff Sessions as a legal expert is warning that he is in contempt of Congress. But Rosenstein, too, may ultimately have to hand off oversight given his role in Trump's decision to fire Comey. The questions included whether he had confidence in Rosenstein, whether he plans to fire special counsel Robert Mueller and how he knows he's under investigation by the FBI.

Created almost 20 years ago by Clinton Attorney General Janet Reno, the special counsel was "the right answer", Starr said, because it while is within the executive branch of government, the role is "assured of practical independence through binding regulations". The order by the general counsel for his transition team casts a wide net on documents that could shed light on ties between Trump's presidential campaign and representatives of Russia's government.

But at the White House today, spokeswoman Sarah Huckabee Sanders acknowledged to reporters that Mueller had been at the White House - just the day before he was appointed as Special Counsel.

An aide to Vice President Mike Pence revealed on Thursday that he was hiring Richard Cullen-a veteran of the Iran-Contra investigation, Watergate and the 2000 vote recount in Florida-as a private lawyer.

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