She endorsed Bernie, and criticized the DNC for putting their thumb on the scale in the primary
Yeah, this is literally all there is to it. In Hardcore Bernie World, if you're a politician who supported Bernie - regardless of your personal or political positions and whether any are progressive or not - you're a True Progressive. If you're somebody with an identical record or have a comparable number of ideological transgressions as "Generic Progressive" but who didn't support Bernie, you're a neoliberal hack.
It's really not complicated. It's also why a) the push for ideological purity from these supporters is so laughable and b) why this movement is very likely to continue falling flat on its face in terms of enacting legislation/policy. They'll just keep supporting anybody who kisses the ring as "progressive" (i.e. supporting Bernie and/or a handful of other figures) and then get all mad when half the candidates that they actually do succeed at putting into office don't turn out to support them on a particular initiative.
