I would grit my teeth and vote Franken (or more likely just abstain), because while Oldiesfreak is closer ideologically and I do very much like him, a President with such a grotesque misinterpretation of American political history just couldn't be good news. Franken would win, too. Franken/Franken.
What if I was running for the Senate in Minnesota?
It would depend on who your opponent was...but between you and Al Franken -- for any office with actual authority -- I'm sorry, Oldies, but I would either abstain or vote Franken.