The title says it, Bernie Sanders would have won against Trump, if he had been the candidate of the Democrats. Here is my reasoning.
Back in the time of the primaries Bernie Sanders had better polls in direct matchups against possible Republican candidates - including Trump. That can change over time, but take a look what happened after the primaries. Hillary Clinton ran in a series of problems, like E-Mail, rumors of health problems, E-Mail again, her husband. Nothing of this would have been true for Sanders. He had no scandals of the like. For some time in the presidential race either one (Clinton and Trump) lost votes if the news focused on them. Usually news coverage means increasing votes, but both candidates were that bad, that in this case news focus was bad for them. Think instead of Sanders, he would have talked about his programs and would have won votes instead.
Another point is, that Trump won over the rust belt and the workers there. A group Bernie Sanders could connect to. Trump would have had a much much harder time to win Pennsylvania, Ohio or the like against Sanders.
So, what do you think?