President Trump reignited the “Crooked Hillary” attacks in a series of tweets calling attention to what he views as a double standard between how Hillary Clinton's email scandal was handled versus the controversy surrounding former national security adviser Michael Flynn, who pleaded guilty in federal court Friday to lying to the FBI.

"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? Rigged system, or just a double standard?”, Trump tweeted.

A few minutes later the president followed up by taking a swipe at the Justice Department.

“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’ 33,000 Emails? No justice!”, he said.

During the 2016 election, Clinton was under FBI investigation for the usage of an unauthorized personal email server while serving as secretary of state during the Obama administration. She was reportedly interrogated by the FBI over a holiday weekend in 2016, which appears to be what Trump was referring to.

Ultimately the investigation found that there was no criminal wrongdoing in her actions, with former FBI Director James Comey saying last summer calling her conduct "extremely careless."

Flynn was fired as national security adviser in February after it was revealed he misled Trump officials about his communications with the Russian ambassador.

Throughout the year, Flynn has been a leading subject of scrutiny in special counsel Robert Mueller's Russia probe. He pleaded guilty Friday to lying to the FBI about his contact with Russian officials in January and has stated he will cooperate with Mueller.

Lying to the FBI could get Flynn up to five years of prison time, but court documents suggest that the sentence could be lighter.