Biden needs two things in a Vice President
Someone who can deliver swing states
Given Biden would only serve one term and is quite old, someone who can step in as President.
The Biden veepstakes
1. Liz Warren: Name recognition, solidifies liberal wing
Not likely, couldn't even carry her home state. Both East Coast
2. Amy Klobuchar: Can deliver key Midwest votes
Possible, but not likely
3. Kamala Harris: Impressive speaker, black vote
Too much baggage
4. Corey Booker: Articulate and passionate, black vote
Too volatile, Both East Coast
5. Stacey Abrams: Georgia, black vote
Possible, Both east Cost, but she would represent the south
6. Gov Lujan Grisham of New Mexico: little known, Hispanic vote