According to Ryan, part of Romney's rationale for picking him was the way his experience complemented what was needed for a presidency focuses on economic matters.
Romney claimed he knew economics, how business worked and how to manage large organizations.
Ryan was familiar with how Washington worked.
So he might pick a veep who complements him somehow, someone who knows Washington or foreign policy.
Or he could just go with whoever might swing a key state.
Kasich served eighteen years on the House Armed Services Committee and was Chair of the Budget Committee for six years. I'm surprised he didn't occur to Mister Mets back then.
How mature.