But, if you look at Clinton/Bernie he underperformed in States with "closed primaries" meaning people had to declare party affiliation months in advance. (New York was almost a year ago) independents and swing-voters weren't allowed to say "hey, I actually like this Bernie guy."
Bernie did overwhelmingly well in places with open primaries. On two occasions he "beat the polls" (IIRC -Indiana and one other had Clinton's chances of winning at ~99% and he came out with victory) open primaries are being credited with contributing to that phenomenon. People who have never voted are coming into the mix for Bernie
If you look closely you will also see a couple States where there has been either "gross incompetence" or voter suppression / electoral fraud.
People's part affiliation swapped without their knowledge, budget cuts forcing extremely long lines, running out of ballots.
In some areas around electronic voting machines, the disparity between voter counts and exit polls are higher than the ones seen at the Ukrainian election which was declared fraudulent.
In Chicago for example there was an "audit" where the observers saw the clerks alter their tallies to match the expected number.
I know that it's all very "tinfoil hat" sounding, but there are a number of places where the disparity is highly suspect.
Edit: (Apologies, I started pasting in references for my outlandish claims and it got wiped because of a mobile-page-reload and have now got to decide whether or not to throw my phone out the bleeping window :))
Here's one reference covering a few points about the electoral fraud thing: http://m.huffpost.com/us/entry/its-not-just-arizona-elec_b_9...
The examples have gotten more egregious since it was written though.