Senator Barkley?

[I spent the winter writing songs about getting better]

His most likely pick is former State Auditor Pat Anderson, who was defeated in 2006. She isn't doing anything now to my knowledge, unlike former Sec of State Mary Kiffmeyer, now elected to a far right State House seat. The only other option in state government is his Lt. Gov., who probably has unfavorables higher than both Coleman AND Franken and obviously he won't appoint someone like Bachmann. Unlikely it'll come to that though.

[I spent the winter writing songs about getting better]

That's why it'd have to be Anderson. Someone important who wouldn't have to resign their spot for a worthless few week job. Maybe an ex-State Rep or Senator who was defeated too I guess.