Democratic Primaries

The ticket is typically balanced on geography. However, in reality the ticket should always be balanced on helping to gain voter blocks that the candidate doesn't attract as well.

So which voting blocks does Biden have a weakness with?
African Americans? NO. Women? NO Latinos (Somewhat), Younger voters (less than 45) (Yes).

Basically those younger than 45 according to the "age gap" in the primary. Joe's running mate should be someone who can increase turnout and enthusiasm among younger voters--maybe not teen to 20'a crowd, but those 30-45 who vote more reliably than the 18-29 demographic.

In these troubled times, there is another key qualification, Joe has to pick someone who is viewed as experienced and competent enough to take charge in an emergency.