While that is true Bernie’s faction will split off from the Democrat party if Bernie is a contender and the Democrat Convention nominates someone who didn’t even compete in the primaries. I look forward to the Socialists running Bernie Sanders or perhaps Tulsi Gabbard in the fall.
I do believe that the Democrat nominee just might come in third.
That would be hilarious if the Sanders crowd threw a hissy fit and mounted a third party bid against the awful "Official" RAT Party nominees, and the end election results were something like this:
Donald Trump / Mike Pence (Republican Party) - 54% popular vote, 301 electoral votes (carry most of the midwest and south)
Bernie Sanders / Tulsi Gabbard (Progressive Independents Party) - 27% popular vote, 222 electoral votes (carry the usual places: California, NY, Illinois, new england, NJ, Oregon, Washington DC, Washington state, etc.)
Joe Biden / Stacy Abrams (Democrat Party) - 19% popular vote, 15 electoral votes (carry 2 or 3 inconsequential states by a slim plurality, something like Delaware, Maine, Colorado?)