Joe Scarborough had been criticizing the Clinton camp for holding back emails sent from her personal email address while she was working at the State Department.
"It's what he said about the Hun, which is, 'They're either at your feet or at your throat,'" the National Memo's Joe Conason said, quoting Winston Churchill on Germany during World War I.
"So you're comparing me to Nazis," the MSNBC host responded. "That's great. You just used a Winston Churchill quote to compare me to a Nazi because you don't like the facts."
Conason explained, "There are times when you've been friendly to the Clintons, I believe you broadcast from CGI at least one time. ... Sometimes you like them, sometimes you don't like them when it's convenient for you."
"Oh no, does that make me a Nazi, Joe?" Scarborough said. "What are you talking about here? I am as transparent as anybody."
Conason tried to interrupt Scarborough to further explain his use of the quote, but Scarborough continued: "No, no, let me finish. You compared me to a Nazi, you brought up a Churchill quote when he was talking about the Nazis."
"No, I didn't compare you to a Nazi," Conason. "He wasn't talking about the Nazis, he was talking about World War I. [The Huns] were not Nazis."
Watch the full exchange in the video above.
CORRECTION: A previous version of this story labeled Conason as a writer for Salon. He is the editor-in-chief of the National Memo.