I think that's the point of the comment you replied to. Biden did quite badly early on in the primaries, and only after a large chunk of other candidates dropped out and threw their weight behind him with endorsements that he did significantly better. In a sense, the party has made up its mind on the candidate it wants.
evgen|5 years ago
The party did not decide, the people clearly indicated who they wanted. They wanted the person who could win the general election. Turns out they were a lot smarter than you give them credit.