As The Hill‘s Mallory Shelbourne wrote Sunday, former FBI Director James Comey is back in the spotlight after one of the Bureau’s top agents investigating Hillary Clinton’s emails was caught sending anti-Trump text messages to a colleague. Mueller fired the agent, Peter Strzok, from the special counsel’s investigation into alleged Russian interference in the 2016 presidential election.

“Peter Strzok, is considered one of the most experienced and trusted F.B.I. counterintelligence investigators,” claimed the New York Times.

During an appearance on CBS News’s “Face the Nation,” Senator Lindsey Graham suggests Comey is under criminal investigation.

The Hill reports:

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Graham said he did not agree with Trump’s description of the bureau, but said Comey will have to answer for decisions he made during his time helming the FBI. Trump fired Comey in May, in a decision that triggered the appointment of Mueller to take over the federal investigation into Russia’s election meddling and its possible collusion with the Trump campaign. “I think he made some decisions that were really very, very wrong,” Graham told host John Dickerson regarding Comey. “There’s an ongoing criminal investigation; Comey may be part of it. You tweet and comment regarding ongoing criminal investigations at your own peril. I’d be careful if I were you, Mr. President. I’d watch this.” Some observers expect Comey to face more questions about his time leading the FBI investigation.

The curious comment comes after President Trump expressed frustration with the media’s coverage of Flynn’s guilty plea and the FBI’s investigation into Clinton’s emails.

“I never asked Comey to stop investigating Flynn. Just more Fake News covering another Comey lie!”

I never asked Comey to stop investigating Flynn. Just more Fake News covering another Comey lie! — Donald J. Trump (@realDonaldTrump) December 3, 2017

“Tainted (no, very dishonest?) FBI “agent’s role in Clinton probe under review.” Led Clinton Email probe. @foxandfriends Clinton money going to wife of another FBI agent in charge,” tweeted President Trump.

Tainted (no, very dishonest?) FBI “agent’s role in Clinton probe under review.” Led Clinton Email probe. @foxandfriends Clinton money going to wife of another FBI agent in charge. — Donald J. Trump (@realDonaldTrump) December 3, 2017

“After years of Comey, with the phony and dishonest Clinton investigation (and more), running the FBI, its reputation is in Tatters – worst in History! But fear not, we will bring it back to greatness,” added Trump.