Most mistakenly, many talking heads compare Trump to Sanders, treating both as their parties' extremes, or both as wild-talking crazy men who will say anything. This is unintelligent analysis. For one thing, Trump's winning attribute, to his supporters, has nothing to do with positions. It's his strong fascist vibe - they love the hate.
The thing that Trump and Bernie have in common is that they both talk without hesitation. Trump does so because he is speaking from his id to his supporters' ids. That is the essence of his political strength. Logic, truth or verification would be an impediment to his success.
Bernie, like Trump, speaks directly, and without hesitation, but in his case it is because his strength is speaking from principle, and his positions are rooted in those principles. He doesn't have to make tactical calculation on the essence of what he is saying — he is already living that essence. His consistent strategy is to say what he means.
Not even Hillary's supporters - not even her advisors, not even she herself - have any answer to questions about her sincerity, authenticity, honesty - even her paid spokespersons are fully conscious that she is dishonest and would rather not talk about it -- because everyone sees that Hillary can't answer a question simply and straightforwardly. She is not wired that way, it would go against her game plan, and for decades, for her whole life, she has been relying on a strategy of trying to confuse people, trying to appeal to the greatest number of people by saying one thing in one time and place, another thing in another time and place, and counting on not being called on it. In a debate or interview, in real time people see and hear the gears grinding as she plots her course through her answers to questions, guided by what her machinery (humans, inculcated in the Bill/Hillary/nowChelsea methods) tells her is the safest, best bet for her electoral goal.
People can see that Bernie is honest. Even his enemies usually concede that, because disputing it is discrediting in itself.
Like Hillary, Trump is dishonest, and has no principle other than self-glorification, but Trump's direct style, his id-to-id communication style, is mistakable for open honesty. If Hillary does become the nominee, it is hard for me to see Hillary's complicated style of deceit trumping Trump's simple and direct deceit.
It is Bernie's direct, intelligent honesty that can trump Trump. Homespun but wise and knowledgeable Bernie has, in spite of tremendous institutional, infrastructural disadvantages, has wrestled Hillary to a near-tie in a system heavily heavily crookedly stacked in her favor. If Hillary becomes the nominee, the rules are reversed. The media will continue to give Trump limitless free media exposure. Bernie can challenge and overcome Trump's advantages with the truth that people are thirsting for. Can Hillary's style of fraudulence trump Trump’s?