Former CIA Director John Brennan argued that former Deputy Attorney General Rod Rosenstein is suffering from a “sickness” derived from President Donald Trump during a Wednesday segment of MSNBC’s “Morning Joe.”

Brennan started by praising Rosenstein, saying, “I’ve been very pleased that he’s been able to support the Mueller investigation.”(RELATED: John Brennan Relieved At Mueller Report Findings, Says Suspicions Were Wrong)

But he quickly switched directions and expressed his discontent with the former CIA director’s letter to Trump commending him for his inaugural address speech, which Brennan claims “was one of the darkest and gloomiest of any president’s address.” He also accused Rosenstein of developing a Trump-induced “sickness”:

…That obsequious farewell letter to Donald Trump, where he praised Donald Trump for his inaugural address.That inaugural address was one of the darkest and gloomiest of any president’s address. … I see it as a sickness. That as they get into this Trumpian vortex, that they have a skewed perspective about right and wrong. They don’t have the moral compass about what is doing right for this country. Their moral compass now is doing what is best for Donald Trump..

Rosenstein formally resigned in a letter sent to the president on Monday. In that letter, he thanked Trump for giving him the opportunity to serve.

“I am grateful to you for the opportunity to serve; for the courtesy and humor you often display in our personal conversations; and for the goals you set in your inaugural address: patriotism, unity, safety, education and prosperity,” Rosenstein wrote to the president.

Brennan finds himself at the center of controversy, as well. He is confirmed to have voted for a communist for president, and the president accused the former CIA director of lying before Congress when he told investigators that there was evidence of contacts between Russian officials and members of the Trump campaign in 2016.

“Brennan lied. Many of these people lied to Congress and nothing happened,” Trump said during an interview on Fox News, adding, “I think Brennan is a sick person. I think there’s something wrong for him. And I watch — for him to come out of the CIA and act that way was so disrespectful to the country and to the CIA and to the position he held.”

Kentucky Republican Sen. Rand Paul announced that a “high-level” source reported Brennan wanted to include the now-condemned Steele Dossier be included in official intelligence reports.