GOP strategist Steve Schmidt said Friday that he believes former national security adviser Michael Flynn's guilty plea signals "the unraveling of all the lies" from the Trump administration.

In an interview on MSNBC, Schmidt, a frequent critic of President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE, said that it is "impossible to overstate what a big deal" Flynn's guilty plea is, and that the revelation that Flynn is cooperating with special counsel Robert Mueller could move the probe closer to Trump himself.

"Once again today, this moves closer to the Oval Office,” he said. “And we see the unraveling of all the lies. The president’s lies, the vice president’s lies, the attorney general’s lies, and we see an administration that has a nonstop proclivity to lying, now we’re seeing the criminal consequences of it.”

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In a stunning development on Friday, Flynn pleaded guilty to lying to the FBI about his contacts with Russian Ambassador Sergey Kislyak in the month before Trump took office.

According to court documents, his conversations with Kislyak were directed by Trump transition officials.

In a statement issued shortly after he entered his guilty plea, Flynn acknowledged that he was cooperating with Mueller's investigation into Russia's intervention in the 2016 election and possible collusion between the Trump campaign and Moscow.