Ken Starr said Monday that he was "absolutely stunned" to read that the FBI reportedly probed whether President Trump was working on behalf of Russia following the firing of James Comey.

The report, published last week, noted that the bureau launched the investigation due to Trump's behavior shortly after Comey's ouster.

Starr, the Clinton-era independent counsel, said on Outnumbered Overtime that he was shocked the FBI would conduct such an investigation.

"Something has gone wrong, and I hope it's being straightened out by Director [Christopher] Wray," he said. "This never should have been. I cannot imagine the audacity and the poor judgement in .. saying that were going to investigate the president of the United States ... as to whether he is somehow in league with Russia."

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He called the decision to launch the "appalling" probe "another sad dimension" of the FBI's recent chapter in history.

It was also reported that Trump went to great lengths to conceal details of his conversations with Russia President Vladimir Putin.

Starr said that although more needs to be known regarding the conversations, the president's notes should "of course" not be made public.

He said that if there was a suggestion Trump was discussing something improper with a foreign leader, only then would it raise a different concern.

"This president is unorthodox, let's face it," he said. "He marches to the beat of his own drummer. And so right now, it would appear that it's much ado about very little, if not nothing"

Watch Starr's discussion with Harris Faulkner above.

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