The case for Harris: Biden’s brain trust — Steve Ricchetti, Mike Donilon and Ted Kaufman — skew older and have deep and trusting relationships with many of the Obama and Clinton veterans who are advocating for Harris.

It rests in part on her prosecutorial skills, which could help her attack the Trump administration with discipline.

The case for Rice: Rice is getting a big bounce from Obama people who claim her presence on the ticket would guarantee the enthusiastic presence of both Barack and Michelle Obama on the campaign trail.

If the contest comes down to a popularity contest with Obama alumni, Rice has an edge — and Rice allies point to her White House experience.