I believe that Sanders is not electable. You can argue, but this is true

[Gothmog]

285. Nate Silver- Sanders Can Win, But He Isn't Polling Like A Favorite

Nate thinks that it is possible for sander to win the nomination but this is not likely. sanders is not going to be the nominee of the party. sanders thinks that getting 30% of the primary vote is sufficient which means taking the fight to the contested convention. https://fivethirtyeight.com/features/bernie-sanders-can-win-but-he-isnt-polling-like-a-favorite/

Historically, though, candidates who are polling at only about 20 percent nationally despite the near-universal name recognition that Sanders enjoys don’t have a great track record. From our research on the history of past primary polls, I found 15 candidates from past nomination processes who, like Sanders, (i) polled at an average of between 15 percent and 25 percent4 in national polls in the first six months of the year before the Iowa caucuses5 and (ii) who had high or very high name recognition.6.....

Achieving a delegate majority could be hard for Sanders
You could also argue that the three winning candidates from the list — Barack Obama and John McCain in 2008 and Mitt Romney in 2012 — aren’t good comparisons for Sanders, especially from a “The Party Decides” standpoint where preferences among party insiders and activists are leading indicators of voter preferences. Romney, for instance, had the backing of the GOP party establishment as a potential consensus choice, whereas Sanders largely lacks it from Democrats. Obama was a rising star, rather than someone left over from a previous cycle, and gained a lot of momentum among party elites as the 2008 cycle wore on, even if they also liked Clinton. McCain, who ran against the party establishment in 2000 but was someone the party could live with in 2008, is in some ways the most favorable comparison for Sanders.

In many respects, however, Sanders is more similar to Jesse Jackson in 1984 and 1988, George Wallace in 1972 and 1976 or Ron Paul in 2012, candidates who represented important constituencies within their respective parties but who didn’t have an obvious way to unite the rest of the party behind them or to win a delegate majority.

At times, Sanders’s strategists actually seem to be leaning into the strategy of being a factional candidate. The Sanders campaign may have all kinds of reasons to feel aggrieved by how the party establishment has treated it, especially when it reads articles like the one in The New York Times that suggest the establishment is out to get it again! Nonetheless, the campaign hasn’t sought to mend fences when conflicts have arisen this year. Instead, Sanders aides told The Atlantic’s Edward-Isaac Dovere that they think they can win the nomination with as little as a 30 percent plurality of delegates. That’s a risky strategy since it would necessarily entail a contested convention, where party insiders would play an outsized role. Nor would Sanders, a 77-year-old white man, reflect the various constituencies of the Democratic Party (and the demographics of the delegates themselves) as well as someone like Harris might.

sanders will not be the nominee if sanders only gets 30% of the primary vote. There are too many real democrats who have long memories and who will not forgive or forget. If this gets to a floor fight, the delegates for the other candidates will not support sanders and the super delegates will get to break any deadlocks after the first ballot.