Vote. Not that being appropriate always bothers me, but you could consider taking into account whether a candidate has his/her science correct. This bears on whether someone is well-informed, and can do a good job at evaluating information. Whether one is independent and skeptical of what one hears. Unfortunately, I could not vote in Missouri, where my vote is needed; I had to remain a NY resident for a while and I voted Friday on absentee ballot.
Chris