Idle thought about Mark Kelly (D-AZ) as a potential VP candidate ... If he wins, he takes a Dem vote out of the Senate. Arizona has a Democratic governor, so she would appoint a Dem to fill the seat until a special election. That creates the risk that a Republican could win in the special election and flip the Senate to the GOP.
@Pitizenlyn Thank you for the insight. I'd hate to lose the Senate. It will be close as it is.