And frequent Trump critic Rep. Ted Lieu (D-Calif.) said that Trump’s tweet was proof of obstruction of justice.

“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,” Lieu tweeted.

Former senior Obama adviser Dan Pfeiffer also chimed in, tweeting that “If Trump keeps admitting to obstructing justice, Ty Cobb might be right that the Mueller investigation may wrap up sooner than we think.”