The party is something like 30% of the population (recent changes due to Trump effects notwithstanding). The leadership of the party are basically republicans,

The party is something like 30% of the population (recent changes due to Trump effects notwithstanding). The leadership of the party are basically republicans, but with nicer sounding rhetoric on identity politics issues. So of course her "extreme" policies don't have wide support. Republicans oppose policies that help anybody but themselves and the 1%, and even though some of them are registered democratic, Republicans still control both parties.