'Pissed, flailing and upset': White House source warns CNN Trump's anger is 'beyond what anyone can imagine'

President Donald Trump is reportedly angrier than he ever has been during his tenure in the White House, as he's beset by former FBI Director James Comey's new book, the FBI raid of his longtime lawyer, and special counsel Robert Mueller's probe.

Via CNN's Jason Morrell, a source close to Trump has told CNN's Gloria Borger that the president is "pissed, flailing and upset" and that his anger right now is "beyond what anyone can imagine."

Another source similarly told Borger that Trump's anger has become "unmanageable" and that he was currently in "lash out" mode.

Trump this week has angrily attacked a multitude of targets on his Twitter account, including the New York Times, the Mueller probe, deputy Attorney General Rod Rosenstein, Syrian leader Bashar al Assad, the FBI, and Hillary Clinton.

The president even attacked Russia over its support for Assad, although he later backtracked on that criticism and said that Mueller's Russia probe was primarily responsible for the poor relations between Washington and Moscow.

Watch the video of Borger talking about Trump below.