By Charles Franklin at Pollster.com…. click on it for a full size version
This chart shows where McCain must gain, and where Obama must hold in order to get to 270.
States appear in order of Obama minus McCain margin. Width is proportional to Electoral Vote. It takes 269 to tie, 270 to win. The yellow states are very close and jumping around a bit with each new poll.
Basically, the EASIEST way for McCain to win would be: McCain must hold his strong McCain states (dark red) and lean McCain states (pink), capture ALL the battleground states (yellow), capture ALL of the lean Obama states (light blue), and pick off one or two strong Obama states (dark blue).