As has been noted by others, the 2016 Primary exit polls have consistently underestimated the Clinton vote share. I compiled the chart above from a handy chart available on various CT websites (such as one that is linked to in this one) which are suggesting that there has been massive voter fraud, given that there is a substantial deviation between exit polling result and the actual vote totals.
The CT theories are suggesting that there has been massive voter fraud, and this needs to be investigated.
In seventeen out of nineteen contests with exit polling since the caucuses in Iowa and Nevada, the exit polls have over-estimated Bernie Sanders’ eventual share of the vote, usually substantially. In nine out of the nineteen contests, the initial exit poll results were outside the margin of error. This is a stunning number of times. There is absolutely no correlation with closed versus open primaries or South versus non-South contests. Translated to a delegate count (not including Arizona because there was no exit polling): Bernie Sanders would have about 58 delegates more and Clinton 58 less. The gap between the two would be about 119 instead of 235. This gap would be closeable, while the actual number is not.
Now, I am not a believer in the CT. If there was massive fraud on such a scale, spread over so many states, and the fraudsters managed to keep it a secret, then they deserve the frauding medal of honor. Heck, they may even deserve my vote for being that efficient (okay… this is just a joke!!).
And so I tend to think that there must be some other explanation. And there is a correlation with something else, which I present below
The chart plots the difference between the actual vote shares and those from the exit polls for both Clinton and Sanders. The two quantities are plotted against the actual vote share. As you can see, there is a fairly reasonable correlation of both quantities. (R^2 is 0.4 and 0.55 for the two traces). There is no discrepancy at low Clinton vote share, and the discrepancy increases as the Clinton vote share increases.
I think the underlying phenomenon should be fairly obvious: Clinton voters are less enthusiastic (despite what Secy Clinton has to say about this), compared to Sanders voters when it comes to responding to exit polls (and, by extension, probably other types of polls as well), but that enthusiasm gap does not exist when it comes to actual voting.