President Donald Trump pauses as the media departs after he spoke in the Roosevelt Room of the White House in Washington, Tuesday, Nov. 28, 2017, during a meeting with Republican congressional leaders. (AP Photo/Susan Walsh)
PHOTO: Susan Walsh/AP
President Donald Trump pauses as the media departs after he spoke in the Roosevelt Room of the White House in Washington, Tuesday, Nov. 28, 2017, during a meeting with Republican congressional leaders. (AP Photo/Susan Walsh)
Now playing
01:47
Comey, FBI fire back after Trump criticism
PHOTO: CNNMoney
Now playing
06:22
How Trump's tweet sparked #WhyIDidntReport
US President Donald Trump speaks during the swearing-in ceremony for Gina Haspel as Director of the Central Intelligence Agency at CIA Headquarters in Langley, Virginia, May 21, 2018. (Photo by SAUL LOEB / AFP)        (Photo credit should read SAUL LOEB/AFP/Getty Images)
PHOTO: SAUL LOEB/AFP/Getty Images
US President Donald Trump speaks during the swearing-in ceremony for Gina Haspel as Director of the Central Intelligence Agency at CIA Headquarters in Langley, Virginia, May 21, 2018. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images)
Now playing
02:03
These are the highlights of Trump's Twitter habit
PHOTO: CNN
Now playing
02:03
Lawmaker: You won't win Twitter war with Trump
trump twitter demanda libertad expresion vo dusa directo usa_00010127.jpg
trump twitter demanda libertad expresion vo dusa directo usa_00010127.jpg
Now playing
02:52
Does Trump purposely include typos in tweets?
NEW YORK, NY - DECEMBER 13: (L to R) President-elect Donald Trump and Kanye West stand together in the lobby at Trump Tower, December 13, 2016 in New York City. President-elect Donald Trump and his transition team are in the process of filling cabinet and other high level positions for the new administration.
PHOTO: Getty Images
NEW YORK, NY - DECEMBER 13: (L to R) President-elect Donald Trump and Kanye West stand together in the lobby at Trump Tower, December 13, 2016 in New York City. President-elect Donald Trump and his transition team are in the process of filling cabinet and other high level positions for the new administration.
Now playing
01:04
Yes, President Trump just retweeted Kanye West
PHOTO: photo illustration: getty images/flatiron books/allie schmitz/cnn
Now playing
01:44
Trump unloads on Twitter at Comey
Maggie Haberman 4.23
PHOTO: CNN
Maggie Haberman 4.23
Now playing
02:06
Maggie Haberman responds after Trump attack
PHOTO: Allie Schmitz/CNNMoney
Now playing
01:55
These are Trump's deleted tweets (2018)
PHOTO: Twitter / @realDonaldTrump
Now playing
01:08
Trump tweets photo from GOP leadership dinner
PHOTO: Will Mullery/CNN Politics
Now playing
03:31
What Trump's tweets taught us in 2017
PHOTO: CNN
Now playing
00:59
Stelter: Trump's tweet on CNN is crazy talk
clapper new day
PHOTO: CNN
clapper new day
Now playing
01:10
Clapper on tweets: Trump is his own worst enemy
US President Donald Trump arrives at Palm Beach International Airport in West Palm Beach, Florida, on February 16, 2018. / AFP PHOTO / JIM WATSON        (Photo credit should read JIM WATSON/AFP/Getty Images)
PHOTO: JIM WATSON/AFP/AFP/Getty Images
US President Donald Trump arrives at Palm Beach International Airport in West Palm Beach, Florida, on February 16, 2018. / AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
Now playing
02:18
Trump slams Oprah, calls her insecure
PHOTO: CNN
Now playing
01:58
Trump explains tweets on his mental state
WASHINGTON, DC - DECEMBER 21:  U.S. President Donald Trump tells reporters that he is leaving the White House to visit troops at Walter Reed National Military Medical Center December 21, 2017 in Washington, DC. Trump said he was visiting the injured military service members to wish them a merry Christmas.  (Photo by Chip Somodevilla/Getty Images)
PHOTO: Chip Somodevilla/Getty Images North America/Getty Images
WASHINGTON, DC - DECEMBER 21: U.S. President Donald Trump tells reporters that he is leaving the White House to visit troops at Walter Reed National Military Medical Center December 21, 2017 in Washington, DC. Trump said he was visiting the injured military service members to wish them a merry Christmas. (Photo by Chip Somodevilla/Getty Images)
Now playing
02:08
Trump: I'm a very stable genius
(CNN) —  

President Donald Trump spent the weekend firing off tweets that took aim at the Department of Justice and the FBI in the wake of the guilty plea by his former national security adviser, Michael Flynn.

Trump has frequently criticized the agencies over their handling of the Russia investigation, and his comments over the weekend were met with fierce pushback from former Justice Department officials.

“I had to fire General Flynn because he lied to the Vice President and the FBI,” Trump tweeted Saturday morning. “He has pled guilty to those lies. It is a shame because his actions during the transition were lawful. There was nothing to hide!”

The tweet raised questions as to whether Trump knew Flynn had lied to the FBI when he fired him in February. On Sunday, Trump’s personal lawyer, John Dowd, said he was the person who drafted it.

Flynn pleaded guilty Friday to lying to the FBI about conversations with Russia’s ambassador during the transition and disclosed that he is cooperating with the special counsel’s office in its Russia investigation.

The President also zeroed-in on the FBI and the Justice Department for not being harsher in its investigation of presidential candidate Hillary Clinton’s handling of emails while secretary of state.

“So General Flynn lies to the FBI and his life is destroyed, while Crooked Hillary Clinton, on that now famous FBI holiday ‘interrogation’ with no swearing in and no recording, lies many times…and nothing happens to her?” Trump tweeted. “Rigged system, or just a double standard?”

He also alluded to Clinton’s use of Bleachbit to delete personal emails.

“Many people in our Country are asking what the ‘Justice’ Department is going to do about the fact that totally Crooked Hillary, AFTER receiving a subpoena from the United States Congress, deleted and ‘acid washed’$2 33,000 Emails? No justice!” Trump posted Saturday evening.

And on Sunday, Trump continued his focus on Flynn and fired FBI Director James Comey, referencing Comey’s testimony to the Senate Intelligence Committee in June that Trump pressed him to end the investigation into Flynn.

“I never asked Comey to stop investigating Flynn,” Trump said. “Just more Fake News covering another Comey lie!”

“After years of Comey, with the phony and dishonest Clinton investigation (and more), running the FBI, its reputation is in Tatters - worst in History! But fear not, we will bring it back to greatness,” he later added.

Sunday’s tweets about the FBI being in “tatters” came alongside the news that a senior FBI official was removed last summer from special counsel Robert Mueller’s investigation into Russian meddling in the 2016 election after an internal investigation found the official sent messages that could be interpreted as showing political bias for Clinton and against Trump.

Reaction to tweetstorm

The FBI has so far not responded to Trump’s tweets about the bureau, but they garnered criticism on social media and elsewhere. Comey posted a defense of the FBI on Instagram Sunday night, quoting his own testimony before the Senate Intelligence Committee in June.

‪“‘I want the American people to know this truth: The FBI is honest. The FBI is strong. And the FBI is, and always will be, independent.’ ‪Me (June 8, 2017),”‬ Comey wrote.

Former acting Attorney General Sally Yates tweeted a response as well: “The FBI is in ‘tatters’? No. The only thing in tatters is the President’s respect for the rule of law. The dedicated men and women of the FBI deserve better.”

Former Attorney General Eric Holder also criticized the President’s tweets.

“The FBI’s reputation is not in ‘tatters’. It’s composed of the same dedicated men and women who have always worked there and who do a great, apolitical job,” he tweeted. “You’ll find integrity and honesty at FBI headquarters and not at 1600 Penn Ave right now(.)”

And fellow Republican Sen. Lindsey Graham, of South Carolina, said to tread lightly.

“There’s an ongoing criminal investigation. Comey may be part of it,” Graham told CBS’s “Face the Nation.” “You tweet and comment regarding ongoing criminal investigations at your own peril. I’d be careful if I were you, Mr. President.”

The FBI Agents Association also defended the bureau Sunday night, putting out a statement from the group’s president, Thomas O’Connor, on Twitter.

“Every day, FBI Special Agents put their lives on the line to protect the American public from national security and criminal threats,” the statement read. “Agents perform these duties with unwavering integrity and professionalism and a focus on complying with the law and the Constitution.

“This is why the FBI continues to be the premier law enforcement agency in the world. FBI Agents are dedicated to their mission; suggesting otherwise is simply false,” it said.