I see you've disregarded I used past tense in regard to his 'railroading' and then changed the tense, which I find underhanded. To bring it to a more plain level, he , at a prior time, under his more notable POTUS bids, ran on the Democratic ticket.

What's also worth pointing out is that the person Democratic upper echelon nominated, without even a primary, the last election was someone who did so abysmally in the popular primaries that she was at single digit percents yet magically got installed as the POTUS contendor without even a a vote. When you consider our voting system is set up that writing a candidate in is essentially throwing your vote away, a popular primary does not even happen (imperfect as it may be), in practice the two parties are operating as bureaucrats of in-party members who are giving you a choice of two people that represent the in-party elite albeit with some different kinds and volumes of scraps tossed to the general populace.

And for the most part, our founding fathers warned us of exactly this.