Another interpretation of Trump's tweet isn't that "they" refers to special counsel Robert Mueller, but rather that "they" refers to the mainstream media, a recurring villain in Trump's tweets, who Trump has frequently accused of inventing "the Russian Federation story".
Mueller also has the authority to investigate whether Trump tried to obstruct justice amid mounting evidence that he pressured the FBI to drop an investigation into his former national security advisor, Mike Flynn. Trump later contradicted his own staff, saying on May 11 he had the Russian Federation issue in mind when he fired Comey.
President Donald Trump has acknowledged that he is now being investigated in the inquiry into alleged Russian influence, describing it as tantamount to a "witch hunt". Though some in the White House have preached caution, fearing a repeat of the firestorm over Comey's firing, many in Trump's orbit - including his son Donald Trump Jr. and adviser Newt Gingrich - have deemed Mueller biased and worthy of dismissal. He's also hired Andrew Weissmann, who led the Enron investigation.
Quoting officials, the Post said one event of interest to Mueller, a widely-respected former head of the Federal Bureau of Investigation, is an exchange on March 22, when Coats told associates Trump had asked him to intervene with Comey to get him to back off from focusing on Flynn.
A spokesman for Trump's private attorney declined to respond to details of the widening probe Wednesday, instead slamming the leaked information as "outrageous, inexcusable and illegal".
The NSA said in a statement that the "NSA will fully cooperate with the special counsel". The New Yorker's Ryan Lizza reads it as Trump confirming that he is under investigation for obstructing justice.
Trump didn't clarify what exactly he was referring to in the early morning tweet.
White House statements about Director Comey's firing because of the FBI's lack of confidence in him are plain, flat-out lies.
Rosenstein prepared a memo for Attorney General Jeff Sessions back in early May, which raised repeated questions about how Comey had handled the Hillary Clinton email investigation - at first, that seemed to be the basis for Comey's firing by the President, until Mr. Trump said a few days later that the Russian Federation investigation was on his mind. Former President Barack Obama requested Mueller to stay for two years beyond the typical 10-year term and Congress approved the request.
"I think, frankly, our story shows that the president is by no means out of the woods as far as the investigation goes", the Post's Barrett told NPR. Coats and Rogers have testified that they were not pressured by the Trump administration. At the end of May, the chief of the Justice Department's Fraud Section, Andrew Weissman, also joined the team, NPR's Carrie Johnson reported at the time.