Two election narratives have somewhat paradoxically collided these past two weeks. On the one hand, the shifts in partisan identification and Barack Obama’s determination to change the electoral map have significantly eroded John McCain’s base. On the other hand and despite Obama's shifted strategy, the fact is states that were battlegrounds in 2004 have remained tight, ensuring that McCain remains highly competitive.

Yesterday,5 polls from crucial swing states showed narrow races in the familiar swing states, while other...