In Reply to: My memory of that period is, Clyburn and South Carolina were posted by blindness on December 25, 2024 at 08:53:26
Clyburn was important yes he rallied black Dems behind Biden but from what I've read it was Pelosi who pulled the coalition together behind Biden.
She was the last one to publicly endorse him, I googled it she did it in April saying she wanted to stay out of the endorsement through the primary to let it run its course.
Bernie was of course the last "Dem" to pull out and endorse Biden and at least he learned his lesson from 2016 and did so early enough and strong enough that his supporters didn't help Trump win.
You are right that Clyburn jumpstarted Biden by endorsing him in S Carolina.