Democratic Primaries

DU has historically had a higher-than-average percentage of both and I think they're a significant chunk of his support here. There are a few high-profile Sanders supporters who I know aren't Dems, because they've said so. The assumption that everyone on DU is a Democrat, or even that the vast majority are, is highly unlikely to be true, even now.

"The Sanders people here are not like those toxic people on social media who are giving Sanders voters such a bad name."

That's clearly not true. Some DUers have been pushing the same nonsense as Sanders' staff, including the "dementia" conspiracy theories, though that meme pretty much died after the last debate, the false assertions about Biden and Social Security, and the constant drumbeat of anti-Democratic Party nonsense plugged by people like David Sirota.