You are doing what conservatives say.
Taking the black vote for granted. It gives the rightwing to play there tune about blacks being on the “Democrat Plantation.”
What I did was address your contention that "investing" in an already loyal base is the best use of Biden's VP pick. As I said, being just politically crass, I think that is incorrect in Biden's case.
Then, far from take it for granted, I provided evidence that the black vote is actually behind a Warren pick. Maybe the only way to get it isn't to pick a black candidate?
It's not shoring up the percentage of voters who vote for you vs. others.
It's increasing the turnout of those self-same voters. 65.3% of white voters voted vs. 59.6% of black voters, and only 47.6% of Hispanic voters.
Increasing the black voter turnout will have more power to help than turning out more white voters. Turning out more Hispanics, obviously, too.
16% of Americans see themselves as progressive. (Or did a year ago...) 15% said liberal, 29% said moderate, and 34% said conservative. When the moderates were pushed to choose, most did, leaving a 48/47 split between conservatives and liberals.
I don't think second seat is going to motivate the shunners of moderatism - it won't give Warren a better chance of winning in 2024, if she were to run. I think the other path has a better shot of making the difference that we need.