Greg Sargent has the scoop:

John McCain and the Republican National Committee are now running robocalls attacking Obama as weak on terrorism -- in McCain's home state of Arizona, according to multiple readers from the state.

The call signals genuine worry about McCain's home state at a time when several polls show the race to be much closer than expected there.

McCain's robocall, which was played to us over the phone by Mary Joe Bartel, a retiree who lives south of Tuscon, attacks Obama as unprepared to defend the country from terrorism, singling out Joe Biden's recent remarks about the likelihood of Obama being tested by an international crisis early in his first term.

This is the fourth straight day with news indicating that Arizona is on the map this last week of the campaign despite the fact that it is John McCain's home state and Barack Obama has not seriously targeted the state, with first Democratic polling shows the race to be within a single digit margin, then nonpartisan polling -- and then even apparently Republican polling, too. This development also comes on the heels of two more nonpartisan polls both showing the race to be narrow and McCain to be under 50 percent.

Cronkite/Eight/ASU

John McCain: 46 percent
Barack Obama: 44 percent

Northern Arizona University

John McCain: 49 percent
Barack Obama: 41 percent

I'll repeat what I said yesterday: With the race in Arizona clearly tight, and the McCain campaign sufficiently worried to divert funds from other swing states to their candidate's home state, the Obama campaign should, if it can find a few hundred thousand dollars, make a modest investment in the state, which would have the potential upside of 10 more electoral votes for Obama's column, in addition to a bolstered argument for a mandate in the event of an Obama victory.