So the real question is: Why didn't all these Hillary supporters participate in the caucus? The disparity in the caucus and primary results of Washington state is astounding; a 72-28 victory for Sanders to a 54-46 victory for Clinton. That's a swing of 52 points. Nebraska's caucus v. primary results weren't this bad.
Because Clinton basically had the nomination wrapped up at the time of the caucus. Why would her supporters waste a Saturday afternoon at a middle school cafeteria when she's going to win anyway?
With the primary, it's all done by mail, so there's no reason not to vote.
Washington's primary certainly wasn't at a point when she had it locked up. Certainly not according to all the pundits or Sanders supporters; in fact, the talk of possibly defeating her was just heating us as Sanders would begin a 6-7 contest winning streak uninterrupted for a month.
However, you're pretty much correct. But I still don't really think that that accounts for the entire disparity; it might, and certainly the 30,000 who turned out in the caucus pales in comparison to the apparently 700,000 who came out today (even when the primary was meaningless and ignored by both campaigns).
