TL:DR: 2016 was meant to be a Clinton coronation with no real challengers, and they had to kneecap Bernie when he got in the way. 2020 was an open, fair election between everyone that wasn’t named Sanders, and they had to kneecap Bernie when he got in the way.
In 2016, [Clinton paid off the DNC’s debts and became it’s only financial lifeline, for which DNC chair Debbie Wasserman Schultz abdicated control of party to Clinton’s team long before she secured the nomination,](https://www.politico.com/magazine/story/2017/11/02/clinton-brazile-hacks-2016-215774/, the AP controversially called the primary for Hillary just before California voted, giving voters the impression the primary was over before voting finished, the AP controversially called the primary for Hillary just before California voted, giving voters the impression the primary was over before voting finished, and the DNC later argued in court that they had no obligation give Bernie a fair, democratic primary.
In 2020, Obama worked behind the scenes to get the other moderates to drop out and back Biden, and Representatives Ford and Smith admitted the party did coalesce around Biden in 2020 to block Bernie.
TL:DR: 2016 was meant to be a Clinton coronation with no real challengers, and they had to kneecap Bernie when he got in the way. 2020 was an open, fair election between everyone that wasn’t named Sanders, and they had to kneecap Bernie when he got in the way.
You screwed up your closing parentheses on the first link. Just a heads up.
Thanks for the heads up, it’s fixed.