Trump confirms he is being investigated over Comey firing

However, it is likely that he was tweeting about Deputy Attorney General Rod Rosenstein, or Mueller who is examining whether the president obstructed justice by firing ex-FBI Director James Comey last month amid the ongoing Russian Federation investigation.

His investigation then grew to include looking at whether President Trump fired FBI Director James Comey because he was unwilling to back off the Russian Federation investigation.

As the investigation expands, that raises the possibility that Rosenstein may recuse himself from that role, since he wrote the memo justifying Comey's firing.

Because the investigation now includes questions about whether or not President Donald Trump may have obstructed justice in conversations with former FBI Director James Comey who he later fired, Rosenstein's involvement has come under scrutiny.

Comey, who was sacked on May 9, told a Senate panel last week he believed Trump dismissed him to undermine the FBI's Russian Federation probe.

In a tweet, the president also seemed to accuse the U.S. deputy attorney general of pursuing a "Witch Hunt". In a series of tweets on Friday morning the president confirmed that he was being investigated for firing James Comey on May 9th. Robert Mueller reports to Rosenstein, but is authorized to pursue the investigation independently. Rosenstein also approved the appointment of Mueller as special counsel after the recusal of Attorney General Jeff Sessions.

The White House initially cited Rosenstein's memo as justification for Comey's termination, though the memo did not explicitly call for Comey to be fired.

Trump criticized an unnamed "man who told me to fire ..."

In a two-part tweet posted on Sunday, Trump wrote: "The MAKE AMERICA GREAT AGAIN agenda is doing very well despite the distraction of the Witch Hunt".

He reiterated tweets from Thursday morning about the investigation. "Americans should be skeptical about anonymous allegations".

Hours later, a source close to Mr Trump's outside legal team said the President did not intend his tweet to be confirmation of the investigation but rather was reacting to a Washington Post story. "The Department of Justice has a long-established policy to neither confirm nor deny such allegations", Rosenstein said in his statement.