Comey testified before the Senate Intelligence Committee last week that he was certain his firing was due to the president's concerns about the Russian Federation probe, rather than over his handling of a now-closed FBI investigation into Hillary Clinton's use of a private email server as secretary of state, as the White House had initially asserted.
Obstruction of justice is defined quite broadly: it involves any conduct in which a person willfully interferes with the administration of justice. It is unclear if McCabe, Comey's successor, has informed Trump of the change in the scope of the probe.
The obstruction of justice investigation into Mr Trump began days after Mr Comey was sacked on May 9, according to people familiar with the matter, the Washington Post said. "The continued illegal leaks are the only crime here", McDaniel said in a statement. "We are not in a position to comment further".
In response to the news, a spokesman for Mark Kasowitz, President Trump's personal attorney for the Russian Federation investigation, said the following: "The FBI leak of information regarding the president is outrageous, inexcusable, and illegal".
In his latest tweet, the president seemed to confirm he is under investigation for possible obstruction of justice.
The order by the general counsel for the 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.
The newspaper reported that the FBI started the alleged obstruction investigation within days of Comey being fired. But then the president himself said he had made up his mind prior to receiving the recommendations from the two top lawyers at the Department of Justice. The president has accused Comey of lying about those encounters.
Trump is less likely to fire Mueller now.
As Mueller assembles his investigative team, statements by Trump's friend Christopher Ruddy this week set off new questions. The office of Director of National Intelligence and Ledgett declined to comment.
Comey testified last week that he also felt pressured to drop the Flynn probe. But Comey did lay out facts that a prosecutor could use to try to prove obstruction. Trump disputed, though, Comey's assertion he had asked for a pledge of loyalty. The Wall Street Journal suggested that Mueller has also requested to interview the N.S.A.'s freshly retired deputy director, Rick Ledgett, who reportedly wrote a memo documenting a call between Rogers and the president, in which Trump challenged the intelligence community's belief that Russian Federation had interfered with the election, and pressured Rogers to say there was no evidence of collusion.
To that end, in a tweet sent an hour later, the president appeared to go right after Mueller's character, saying that the Russian Federation investigation is being "led by some very bad and conflicted people!"
Chatter surfaced earlier this week that the president was considering firing Mueller.
Trump, believes that the mainstream media has not been fair to him and outlets like The New York Times, The Washington Post and CNN is against him.
In general, 29 percent of Americans say they have a great deal of confidence in the people running the Federal Bureau of Investigation. That list could very well end up including the president's own son-in-law, Jared Kushner. The president's preferred narrative is investigators pivoted toward obstruction of justice instead.