We don't. Clinton's win over Sanders was so heavily pushed by the DNC who did everything in their power to insure that Sanders was not the nominee.
Also If it were an actual democracy than we would all admit that Trump and Shillary would be the two most credible people for the most important job in the United States out of 318 MILLION people.
This has turned into a social media circus act, and the people's opinion has become so manipulated and easily swayed that control over the elections is all but a certainty through marketing, tweets, news...movies...television. It's ridiculous.
Take Obama for instance. Their is NO FUCKING WAY that the current president should openly shit all over one of the candidates. I mean I get it...Trump is scary. But he's trying to openly SWAY public opinion by shitting on Trump.
How is that not trying to manipulate the vote?
That's complete and utter bullshit.