Graham Platner, a far-left Senate candidate in Maine, amplified a social media post on Thursday from a far-right conspiracy theorist well-known for viciously antisemitic commentary — before quickly deleting the statement.

In a comment to X late Thursday morning, Platner approvingly boosted a remark from Stew Peters, an extremist radio host who has frequently promoted antisemitic tropes and engaged in Holocaust denial, calling a war with Iran “the only thing Republicans and Democrats have both given a standing ovation for.”

“As always, there’s one thing that brings Republican and Democratic politicians together: sending other people’s children to die in stupid wars in the Middle East,” Platner, a 41-year-old Marine veteran turned oyster farmer who has sharply criticized U.S. military engagement abroad, wrote in his own post.

He deleted the post an hour or so after it had been flagged by online observers who noted that he was elevating a problematic figure with a long record of hostile rhetoric toward Jews.

The Anti-Defamation League has described Peters as a “prolific antisemite” who blames “‘the Jews’ for everything he believes is wrong with society,” while the Southern Poverty Law Center has said his radio show has “become a central hub for antisemitic and conspiratorial content.”

He has said Judaism is “satanic” and a “death cult,” promoted blood libels, called for a “final solution” to mass-deport American Jews and questioned the existence of gas chambers that exterminated Jews during the Holocaust, among other conspiratorial assertions.

In a statement to Jewish Insider, a spokesperson for Platner said the post had been published due to an oversight. “We were reposting a C-Span clip of Trump speaking about the potential war with Iran and didn’t realize that the video had been posted by a despicable account,” the spokesperson said. “When we learned who the poster was we immediately deleted the post.”

The social media blunder is a particularly sensitive issue for Platner, who earlier in his campaign faced scrutiny over a Nazi tattoo on his chest, which he had covered up last October. He has insisted he was not aware the tattoo closely mirrored a Totenkopf, a skull-and-crossbones icon used by an infamous Nazi SS unit, even as a former acquaintance told JI that he had years ago specifically identified it as such. He has denied such claims.

“I am not a secret Nazi,” Platner said in a podcast interview last year, while calling himself “a lifelong opponent” of “Nazism and antisemitism and racism in general.”

Despite such baggage, polling has shown Platner holds a commanding lead in the Maine Democratic primary race, where he is facing Gov. Janet Mills to challenge Sen. Susan Collins (R-ME), who is one of the most vulnerable Republican incumbents up for reelection in the midterms.