“Andrew Yang supporters, be SMART with your memes.”

The post appeared on the Yang For President subreddit on Thursday, warning supporters against creating anything that might reflect poorly on the candidate. “I get it,” the author warned, “you want to show off how dark your sense of humor is.” Pro-Yang memes are fine, the post argued, but the latest flood of Pepe and Trump-adjacent rage comics “reinforces the stereotype we are trying to avoid.”

“Seriously,” the message closed, “the memes being spread right now are sabotage.”

A tour through 4chan’s notoriously toxic /pol/ forum shows what the poster was so worried about. Yang is a minor player in the Democratic primary so far, an entrepreneur and political outsider with no traditional base of support. But on /pol/, he’s the only candidate that matters. The boards are full of Yang-related memes, including familiar faces like Wojak and Pepe. One reworked the Virgin / Chad meme (contrasting a dejected virgin with a carefree and popular Chad) to show Yang triumphing over a humiliated Trump.

“For anyone with this agenda, we do not want your support,” Yang says. “You are not welcome in this campaign.”

Other images are more disturbing. One meme showed Yang redistributing wealth from a Jewish banker caricature, the kind of noxious anti-semitism that’s common on /pol/. Another warning about meme sabotage landed on /pol/ around the same time as the Reddit post, but the local trolls were unfazed.

It’s part of a larger tension for the Yang campaign, which has emerged as an unusual force in the presidential race. With only minimal experience in politics, Yang has built his campaign around the unconventional promise of a $1,000 monthly basic income, combined with Medicare for All and an economic policy he calls “human-centered capitalism.” Yang has found an unusual outpouring of support online, potentially earning a spot in the upcoming debates on the basis of fundraising alone. But that support has come with unusual liabilities, as enthusiasm for the candidate mutates into something uglier and harder to control.

Yang’s supporters — known online as the “YangGang” — seem to be drawn from across the political spectrum. According to the Daily Beast, Yang saw a surge of new supporters after an appearance on the Joe Rogan Experience in February, often a crossover point between mainstream culture and the fringe right. At the same time, his Universal Basic Income proposal has proven genuinely popular with younger voters disenchanted with conventional politics.

“He feels like someone who forms his own ideas and knows what he’s talking about,” one online supporter told me. “And YangGang sounds like a dope group to be a part of.”

At the same time, white nationalist supporters have been able to pick and choose statements from Yang to support the idea that he’s uniquely concerned with halting the decline of the white race. They point to his recent appearance on Tucker Carlson, or interpret a tweet about the opioid epidemic as broader concern about declining white birth rates. On 4chan, one user introduced the tweet by saying, simply, “Andrew Yang cares about White People.”

There’s no indication that the campaign has courted that support, and when reached by The Verge, Yang unequivocally rejected it. “I denounce and disavow hatred, bigotry, racism, white nationalism, anti-Semitism and the alt-right in all its many forms. Full stop,” Yang said in a statement. “For anyone with this agenda, we do not want your support. We do not want your votes. You are not welcome in this campaign.”

“As one of the first Asian American candidates for President in our history and the son of immigrants, I see racism and white nationalism as a threat to the core ideals of what it means to be an American,” Yang continued. “I have two young children who will grow up in this country. I know what that means. “

“It’s not politics as usual. It’s more like chemical warfare.”

The campaign said they haven’t made any particular effort to target Trump voters, but had been drawn to unconventional outlets out of necessity. Without the clout of an establishment candidate, the campaign can’t rely on mainstream coverage, which makes fringe outlets like Joe Rogan or conservative outlets like Tucker Carlson difficult to turn down. Yang was also recently seen at a Turning Point conference, seemingly fitting into the same pattern — although the campaign says he was in DC for a separate event and only stopped for a picture, not appearing at the conference itself.

That approach has also attracted some strange bedfellows. On Thursday, WikiLeaks tweeted that Trump was “losing the meme war” to Yang, a tacit endorsement from an organization that has rarely spoken favorably about Democratic candidates. In November, prominent white supremacist Richard Spencer tweeted encouragingly about Yang’s campaign, saying “everyone should take this man and his ideas seriously.”

The result is a noticeable rift among Yang supporters online. Multiple subreddits have already been locked, either wary of 4chan invaders or outsiders scrutinizing their content. The infamous /r/thedonald community has also posted Yang links, although it’s unclear if it’s meant as a brigading campaign or genuine support from disaffected Trump voters. When hostile invaders do swarm the official subreddits, it’s never clear where they’re coming from.

“The brats overwhelming the sub read like r/thedonald types, but who knows anymore,” another supporter told me. “Maybe they saw an easy target as a lesser known candidate and want to utilize their newfound abilities of misinformation on the web.”

“It’s not politics as usual,” he continued. “It’s more like chemical warfare.”

Update 7:04PM ET: Updated with campaign statement on the Yang sighting at Turning Point.