You have to love a political party that not only claims to represent the people, but puts in a safeguard so that the bosses can override the will of the people if they don't like it.
I've also heard the conspiracy theory the other way: GOPers voting for Clinton as she would be a more vulnerable opponent.
Don't talk to me about GOP election fraud. The Democratic party is an amalgamation of urban political machines for whom election hijinks is their bread and butter.
What this primary comes down to is a fight between the people who use the "message" of "fighting" for the "working class" as a means to get the sheeple to keep them in office, and the progressives who, silly rabbit, actually take the party rhetoric at face value.