1 In 10 Sanders Primary Voters Ended Up Supporting Trump, Survey Finds

[Adam Griffin]

Well, you're never going to convince the "progressive" hacks that holding 90% of a primary candidate's base in a general election is perfectly normal and actually quite impressive based on recent historical observations.

The KY/WV discussion has merit and actually should be expanded to include OK, as well as portions of other states like NC where Bernie signficantly overperformed demographics due to closed primaries/registration.

Bernie got 500k votes out of KY/WV/OK, about 4% of his primary total; it'd be safe to say that 200k votes in those three states were votes neither he nor Clinton would have got in the general, based on how those states voted both in 2016 and in previous elections. Throw in what we'd expect out of NC and that basically brings you to 2% of Bernie's total primary vote being unobtainable in the general from just those 4 states.

Another area I would look at - but that hasn't been talked about too much in terms of the effect of closed primaries augmenting Bernie vote - is the Northeast. States like NY have systems that work in both directions: it wasn't just low-information independents who voted to vote for Bernie but couldn't because they didn't register in time, but also Republicans registered as Democrats in heavily-Democratic states who did so in the first place to have influence in local and statewide primaries.

Anyway, it wouldn't surprise me at all if after everything was said and done, half of the Sanders-Trump voters nationally were long-time Republican presidential voters who could never have been won.