Everybody says ‘Bernie would have won’ or ‘Bernie wouldn’t have won,’ but I won’t really believe either until I see some polling data.
Which doesn’t exist, because Bernie never took on Trump head-to-head as the Democratic nominee.
You could still ask “If the election were taking place today between Bernie Sanders and Donald Trump, which would you vote for?”
Well you can ask, but the data won’t mean anything because people are in a different place now than they were in November of last year.