Duh.....don't know how I missed that. I'm not a registered Democrat, but would have voted for Sanders in the Primary. Many Independents seemed to view this as one of the ways that Democrats 'cheated', but in fact it's very common. Heck, quite often, I've voted in Republican open Primaries just to help the candidate that I felt was least likely to win. Primaries are not like the General Election. Political Parties are allowed to engage in actions which may often benefit a candidate (see also: Superdelegates, Brokered Convention) that suits their platform more as long as they maintain the appearance of being neutral. Hell, Caucuses aren't even a good example of Democratically Electing a Party leader! These have been going on for years, but Bernie Bros didn't care about them until it hurt their candidate's chances.