President Donald Trump lashed out against critics of his decision to fire FBI Director James Comey on Twitter Wednesday morning, targeting Democrats who were displeased with how Comey handled the investigation into Hillary Clinton's use of a private email server.

Trump was reportedly taken by surprise by the overwhelmingly negative reaction throughout Washington at his decision to fire Comey, believing the move would be welcomed by both Republicans and Democrats.

"The Democrats have said some of the worst things about James Comey, including the fact that he should be fired, but now they play so sad!" Trump wrote . "James Comey will be replaced by someone who will do a far better job, bringing back the spirit and prestige of the FBI."

"Comey lost the confidence of almost everyone in Washington, Republican and Democrat alike," he continued . "When things calm down, they will be thanking me!"

The president then focused his attacks on Sen. Richard Blumenthal, D-Conn., who was on CNN and MSNBC Wednesday morning calling for a special prosecutor and raised the possibility that the investigation into Trump's campaign's connections to Russia could turn up evidence that some of the president's allies "may have committed treason, or fraud, or lied to the FBI."

"Watching Senator Richard Blumenthal speak of Comey is a joke. 'Richie' devised one of the greatest military frauds in U.S. history," Trump wrote . "For years, as a pol in Connecticut, Blumenthal would talk of his great bravery and conquests in Vietnam - except he was never there."

"When caught, he cried like a baby and begged for forgiveness...and now he is judge & jury," he continued . "He should be the one who is investigated for his acts."

Trump has previously attacked Blumenthal for misrepresenting his military service. At a ceremony for veterans in 2008, Blumenthal said he "served in Vietnam," although he in fact received five deferments. He eventually joined the Marine Reserves, but was never sent overseas; he says he had "misspoken" about his record .

And Trump also went after reports that his longtime confidant Roger Stone – who has been mentioned as part of the FBI investigation – urged him to fire Comey.

"The Roger Stone report on @CNN is false - Fake News," Trump said . "Have not spoken to Roger in a long time - had nothing to do with my decision."