Larouche is really in his own anti-semitic universe, you won’t find mainstream Democrats who support him and the great majority decry him, and you won’t see him getting any party funds. Just as the GOP derided David Duke from Stormfront when he was running for office, the Dems deride Larouche. He’s got his own movement and his registration as a Democrat is a convenience and not something you should describe him as. If anything he’s closer to paleolibertarian Lew Rockwell than the democrats.