And has President Trump engaged in it, by reportedly telling FBI Director James Comey that he hoped Comey would "let go" of the bureau's investigation of Trump's National Security Adviser Michael Flynn, and then firing Comey months later?
"I hope you can see your way clear to letting this go, to letting Flynn go", Trump told Comey, according to the former Federal Bureau of Investigation chief's record of the meeting, as reported by the Times. "He is a good guy".
March 8, 2017: During a cybersecurity conference at Boston College, Comey says he plans to serve his entire 10-year term, quipping, "You're stuck with me for another 6½ years".
What exactly is obstruction of justice?
"He documents everything", one source said. As he could open a whole new angle into the Russian Federation investigation, the former FBI director's testimony will be must-watch TV. That's why I've previously raised 25th Amendment questions about Trump's ability to "discharge the powers and duties of his office" and have recently called for immediate initiation of impeachment investigations - akin to convening a grand jury to consider returning a criminal indictment.
"We've learned that if the reporting is accurate, that the president is willing to directly interfere with an active investigation".
In bragging of his access to secret information, he shared details of an Islamic State threat involving laptop computers on airplanes with Russian Foreign Minister Sergey Lavrov and Ambassador Sergey Kislyak.
According to the New York Times, Mr Comey wrote in a memo that the President told him: "I hope you can see your way clear to letting this go, to letting Flynn go".
The vice president and two spokesmen for the White House said Comey was removed from office on recommendations from Justice Department leaders, who were unhappy with his handling of the Hillary Clinton email investigation in 2016.
The House Oversight and Government Reform Committee appropriately requested the memo Comey allegedly wrote, Ryan said.
The Comey memo revelation was met with alarm on Capitol Hill Tuesday night, not only among Democrats but with several Republicans as well.
It's almost certain that presidents can't be prosecuted under criminal law while in office. "At worst, he has obstructed justice".
"The country is being tested in unprecedented ways".
The reactions on the Republican side, while more muted, nonetheless expressed serious concern.
"Congress needs to see the Comey memo", tweeted Sen.
According to Sen. Jeff Flake, it's the new normal.
Democrat Tammy Duckworth of IL says Trump's sharing of top-secret information with senior Russian officials and his firing of former FBI Director James Comey show he's refusing to confront the "clear and present threat from our adversary".
A spokesperson for Republican Sen. After the news broke of the Comey memo, Minority Leader Chuck Schumer, D-N.Y., stood in the chamber and said, "I say to all of my colleagues in the Senate - history is watching". "It certainly raises questions and he will follow up on acquiring those facts from credible sources".
The committee said Wednesday that it is also asking Acting FBI Director Andrew McCabe to give the committee any notes that Comey might have made regarding discussions he had with White House or Justice Department officials about Russia's efforts to influence the election. "We need to get those notes, if they exist, that Director Comey took of this conversation", Schiff told ABC on Wednesday.
House Speaker Paul Ryan cautioned against jumping to conclusions about President Donald Trump's alleged meddling in an FBI investigation of his administration and dismissed the need for more outside oversight of the Department of Justice probe into Trump campaign ties to Russian Federation, as calls for a special prosecutor grow louder on Capitol Hill.