I have a theory:
I think Biden stepping aside with such big support for Harris created a vibe of selflessness and generosity among democrats. More people gave because Biden gave of himself.
And Harris’ genuine praise of Biden created unity.
It was inspiring.
@mathcolorstrees It may be much simpler than that... Harris is just an exciting candidate where Joe wasn't. We were full of existential dread that Joe would sleepwalk into a loss, but Kamala brings a whole new level of enthusiasm and hope.
@LouisIngenthron I’m sure some people did feel this way, and I agree Harris is a fantastic candidate. But there were also people who disagreed with this assessment of Biden. And basically everyone joined in.