Former CNN contributor Jeffrey Lord. YouTube/CNN CNN severed ties with Jeffrey Lord after the conservative commentator tweeted a Nazi slogan on Thursday.

The message — "Sieg Heil," the Nazi victory salute — came amid what appeared to be a developing feud with the president of the liberal media watchdog Media Matters. Lord tweeted the slogan after the president of Media Matters, Angelo Carusone, pointed out a spelling error in a column Lord wrote on Thursday for the right-leaning site The American Spectator.

"Nazi salutes are indefensible," a CNN representative said, according to CNN's Brian Stelter. "Jeffrey Lord is no longer with the network."

Lord's column summarized his feud with Carusone and referred to Media Matters as "Media Matters Fascists" and "anti-free speech bigots."

In follow-up comments to his tweet, Lord indicated the Nazi slogan was a reference to another Spectator article he wrote a day earlier, in which he blasted Media Matters for attempting an advertising boycott of Fox News host Sean Hannity. In that article, Lord used the salute to compare Media Matters to fascism.

"The American Spectator has been unable to confirm reports that the original draft of this Media Matters revision ended with the words: 'Seig Heil!'" Lord wrote.

In another reply to his tweet, Lord said he was "mocking Nazis and fascists."

Lord responded to Business Insider's request for comment by providing a link to his article with the "Sieg Heil" reference, adding, "Did you read the original article from yesterday?"

Lord often appeared on CNN as a political commentator and is a supporter of President Donald Trump.