Jimmy Kimmel is not a popular figure with Donald Trump and his allies, and now he's drawn the wrath of Fox once again after an online exchange with the Secretary of Health.

"RFK Jr. posted something from a parody website that he believed proved his thesis that liberal comedy is on the decline because we make fun of him," explains Kimmel in the clip above. "I responded by pointing out a dumb spelling error he made, and that exchange caught the eyes of the gang at the Fox Business channel."

Kimmel's exact response on Instagram was to correct RJK Jr.'s misspelling of the word "nadir", after which he wrote: "Now get back to spreading polio."

Unsurprisingly, the hosts of Fox Business, Dagen McDowell and Brian Brenberg, weren't impressed, as Kimmel showed in a clip.

"Polio is not funny," says McDowell. "Chickenpox is kind of funny. Um, shingles. I've had shingles. Shingles is funny."

"Alright, OK, well that's helpful at least. Shingles is funny. What about chlamydia, is chlamydia funny?" asks Kimmel. "See, we can work together, let's punch this up."

Kimmel also had something to say about the Fox Business guest who was asked to comment during the program, fitness instructor and media personality Jillian Michaels.

"What do you think, Jillian?" laughs Kimmel. "How did it come to this? Trump raided that network to fill his cabinet positions and now there's nobody left to be on it."