For a second straight day, President Trump used Twitter to go on the attack over the probe into links between Russian interference into the 2016 elections and his own campaign for President, this time targeting a former CIA Director in the Obama Administration, John Brennan, who publicly ridiculed the President and GOP leaders in Congress on Sunday, after Mr. Trump launched a Twitter barrage over the fairness of the Russia probe.

"John Brennan is panicking," the President said of the former CIA chief. "He has disgraced himself, he has disgraced the Country, he has disgraced the entire Intelligence Community."

In his tweets, Mr. Trump placed Brennan at the center of a conspiracy to use the 'Steele Dossier' to start what the President says was a politically motivated investigation of the Trump Campaign.

"This guy is the genesis of this whole Debacle," the President wrote, quoting Dan Bongino, a conservative commentator who ran unsuccessfully for Congress in Florida and Maryland.

"This was a Political hit job," the President wrote.

Mr. Trump's tweets came just a few hours before he was going to the CIA to swear in the new Director of Central Intelligence, Gina Haspel, who was confirmed to the post last Thursday by the U.S. Senate.

Ironically, Brennan has been a strong public supporter of Haspel, breaking with many Democrats, who had pressed for her rejection in the Senate.

Brennan, who was CIA Director during the second term of the Obama Administration, earned the ire of the President with a Sunday tweet that not only slammed the President, but as GOP leaders in Congress, accusing them of doing nothing in the face of an effort by Mr. Trump to interfere in a lawful investigation of Russian meddling in 2016.

Brennan has sniped at Mr. Trump on Twitter before, accusing him earlier this month of lying about the Iran nuclear deal, and arguing he has diminished the office of the President of the United States.

"Your hypocrisy knows no bounds," Brennan tweeted in late April, when Mr. Trump accused former Director of National Intelligence James Clapper of leaking the Steele Dossier to CNN and lying about it.

The tweets by the President on Monday morning did not rival his outburst on Sunday, in which he savaged the probe of Special Counsel Robert Mueller, and said he would demand a review of whether the investigation was political in nature.

Top Justice Department officials responded on Sunday evening by saying they would have the Inspector General review Mr. Trump's claims.

It was not immediately clear if that move satisfied the President, who made this declaration Sunday afternoon on Twitter:

Democrats derided the President's outburst on Twitter, again saying the Mueller investigation should be allowed to go forward without interference.

"Trump can wriggle and squirm and spew on Twitter all he wants, but in America the law will run its own course," said Sen. Sheldon Whitehouse (D-RI).