Obama Widens the War Map: Goes After Arizona and Other 'Red' States

The notion of stretching the map was never about downplaying the significance of Ohio and Florida -- they remain the two biggest battlegrounds -- but it is about making the list of swing states longer than two.

With that in mind, it's striking to see where the Obama campaign is investing resources now.

Barack Obama's campaign announced Friday that it was going on the air in John McCain's home state of Arizona for the first time this cycle, as a new CNN poll of polls released this morning finds the Republican nominee leading the Illinois senator there by just 4 percentage points, 49 to 45 percent. Six percent of the state's voters said they were unsure about their presidential pick.

Obama campaign manager David Plouffe told reporters the campaign's positive closing argument spot, 'Something,' will hit the airwaves in Arizona. He also said the campaign was going back on the airwaves in Georgia and North Dakota with its negative closing argument spot, 'Rearview Mirror,' which ties McCain to President Bush.

It's one thing to open offices and organize volunteers in these states, but we're talking about television advertising in the last four days of the campaign.