Obama in enemy territory
Why do this?
Perhaps they have a little too much money - or perhaps they feel they have secured all the votes they can in Pennsylvania and Ohio.
Or (more likely) they want to create a news story that further drowns out John McCain's "redistributionist-in-chief" effort.
But will a few adverts become a "surprise" Obama trip to Arizona over the weekend.
Downside: it's the arrogance, stupid.
Upside: a huge news story that dominates the free media final cycle and stymies Mr McCain's effort to tell a tale of come-backs and last ditch stands...