Fox News host Sean Hannity suggested that Joe Scarborough, co-host of MSNBC's "Morning Joe," needs “help” for his “obsessive-compulsive hatred” of President Trump.

"Maybe liberal Joe, maybe you should worry about getting his emotions in check and not letting this obsessive-compulsive, nonstop hatred of President Trump send him over the edge,” Hannity said Thursday.

On Wednesday, the president suggested on Twitter that NBC should terminate “low ratings” Scarborough for the “unsolved” 2001 death of a staffer in his Florida district office while he served in Congress, dredging up old conspiracy theories tying Scarborough to the death.

In response, Scarborough said on his morning show that “everybody around Donald Trump knows he's not stable” and suggested he is “mentally unfit.” He added that “people close to him during the campaign told me had early stages of dementia.”

Hannity refuted Scarborough’s accusations, claiming, “I know for a fact that’s not true.”

He then suggested, with a hint of snark, that the morning show host was now “Dr. liberal Joe” for his on-air diagnosis of the president.

“Joe, you need help,” Hannity proclaimed while adding that Scarborough should be covering other more pressing issues in the news, such as North Korea.

Scarborough was a longtime Republican who left the party earlier this year after expressing frustration with the GOP in the aftermath of the 2016 election.

Scarborough and his co-host and fiancee Mika Brzezinski have often found themselves the targets of the president’s attacks on the media.