How about Condoleeza Rice? Brilliant woman. A moderate, centrist Republican. She'd bring crossover appeal, strong international experience, a tremendous knowledge of Russia, and would cover the African American woman angle quite nicely. Just a thought...
Not a bad idea at all. But Biden said he wanted someone ready to govern on Day One should something happen to him, which I would take to mean someone who has had to make hard decisions in a previous job. Don't think she ticks that box, ditto most senators and congressmen. Exceptions would be Harris, who was Attorney General, and the governors, none of whom are African American (you see where I'm going with this.....)