'Oh my god, he just admitted to obstruction': Legal experts aghast at Trump's reckless Flynn tweet
President Donald Trump -- Screenshot

When President Donald Trump tweeted on Saturday that he's certain everything ousted national security adviser Mike Flynn did during the transition was "lawful," he may have openly admitted to the crime of obstruction of justice.

"Oh my god, he just admitted to obstruction of justice," tweeted former Department of Justice official Matthew Miller. "If Trump knew Flynn lied to the FBI when he asked Comey to let it go, then there is your case."

"Never tweet," Miller added. "Especially if you’re going to tweet an admission to a crime."

The Hill reported that Rep. Ted Lieu (D-CA) joined in, writing, "THIS IS OBSTRUCTION OF JUSTICE. @POTUS now admits he KNEW Michael Flynn lied to the FBI. Yet Trump tried to influence or stop the FBI investigation on Flynn."

Former ethics czar to President George W. Bush Richard Painter said that Trump is tweeting his way straight into federal charges.

Dan Pfeiffer -- a senior adviser to the Obama White House -- said, "If Trump keeps admitting to obstructing justice, Ty Cobb might be right that the Mueller investigation may wrap up sooner than we think."