While Fox News personality Sean Hannity was guest hosting on the panel show "The Five" on Monday, co-host Juan Williams called him out for his close ties to Presiden Donald Trump — ties that have raised ethical questions in the past.

"You have a Sean Hannity agenda," Williams said of his co-host. "I think you're running this presidency."

"That is the silliest thing I've ever heard," Hannity shot back.

"Oh, so ridiculous," Williams said mockingly. "How could I say such a thing!"

"So ridiculous, yeah. That's what CNN fake news says," Hannity responded — apparently unable to resist using the president's "fake news" catchphrase while trying to distance himself from Trump.

Though it's widely known that Hannity and Trump are friendly, reporting has shown that the connection goes even deeper than it appears on the surface. Hannity, for instance, is one of three of Michael Cohen's clients — the president's former lawyer who is at the center of a federal investigation — a fact the host neglected to mention until it was revealed in court. And last week, the White House hired Bill Shine, the former co-president of Fox News, who is known to have been a close ally of Hannity.

Vanity Fair reporter Gabriel Sherman even reported on Monday that some in the White House believe Trump's planned announcement of his supreme court pick at 9 p.m. was arranged to give Hannity's show — which airs at 9 p.m. — a ratings boost.

Watch the clip below: