The 'carpetbag coronation' began in 1999-ish.
Dems got tired of that drumbeat in the rear of their skulls... so by 2015, a lot of them jumped onto the Sanders fad-wagon without thinking twice about it.
Here was Terry McCauliffe's line-of-succession: bill (8 years), gore (4-to-8 years), hillary (4-to-8 years), McCauliffe himself (8 years)... followed by a Kennedy-family member, or chelsea.
He overestimated coronations and their effect upon the American political-process.