One lesson of Palin’s sometimes-difficult time in the spotlight has been that Alaska is an extremely difficult base for national politics. From a distant political culture to a daunting time difference, Palin hasn’t been terribly well served by the fact that her state is little-known to reporters in the lower 48, and that email inquiries arrive at 3:00 a.m. needing answers by 5:00 a.m.

And Arizona carries its own significance: Basing a campaign there would be a provocative rejection of any lingering political cost from those who connect her harsh rhetoric and Gabrielle Giffords’ shooting — a traditional refusal to retreat. It’s also the core of the politically contested, fast-growing new West.