The major credential of all VP’s going as far back as I can remember is their foreign policy experience.
Picking a junior senator from a swing state won’t do Trump any good. Picking a young latina won’t do any good either. Pandering never works. Corker is a sell out and I don’t like him. But he helps the ticket. He has no principles and will do whatever Trump tells him to do.
As an OH resident, I find following his newsletters interesting. He really does a lot of stuff that doesn't get publicity.