Former Central Intelligence Agency Director John O. Brennan has never shied away from criticizing President Donald Trump. Brennan's criticisms - like calling Trump's Helsinki press conference with Vladimir Putin treasonous and decrying The president's "moral turpitude" for firing CIA Deputy Director Andrew McCabe - led to the controversial decision of the White House to revoke his security clearance. It was a move many thought vindictive on the Trump administration's part, as former security officials usually keep their clearances to offer input on developing issues of national security.

Clearance or no clearance, Brennan hasn't shied away from holding the president accountable, and today is no different. With the new development that former Trump campaign chairman Paul Manafort lied to the FBI even after reaching a plea deal in exchange for his cooperation, Trump took to Twitter to decry the investigation for the umpteenth time.