https://nymag.com/intelligencer/2020/03/bernie-sanders-democratic-primary-joe-biden-2020-voters-establishment.html
Sanders advisers told the New York Times they believed they had been on the precipice of sweeping to victory on Super Tuesday, until Amy Klobuchar and Pete Buttigieg dropped out and endorsed Biden. Ben Tulchin, a Sanders pollster, claimed the candidate was on the brink of winning until the most unprecedented event in the history of presidential primaries occurred.
It is hardly unprecedented for the fifth- and sixth-place candidates to drop out of a race after four primaries. Yet Sanders himself has fixated on this decision as evidence of an Establishment conspiracy. Appearing on ABCs This Week several days later, he described it as the power of the Establishment to force Amy Klobuchar, who had worked so hard, Pete Buttigieg, who had really worked extremely hard as well, out of the race.
From Bernies perspective, dropping out of a race once you have no chance of winning is peculiar behavior that can only be explained by the work of a hidden hand. For most politicians, though, it is actually standard operating procedure. Only Sanders seems to think the normal thing to do once voters have made clear they dont want to nominate you is to continue campaigning anyway.
Sanders campaign spokesman Mike Casca argued, Because of the agenda that hes putting forward, a lot of super wealthy forces are aligned against him. But Sanders has enjoyed a wide spending advantage over Biden, who at the key juncture was operating on a shoestring budget. If Michael Bloomberg had won, it would have been fair to wonder if he had bought the nomination. Bidens appeal to the electorate was authentic, not purchased.