There is a clear bias in favor of Obama in the media that is becoming a negative for the Democrat's campaign. He and his surrogates are being asked softball questions, and the media template repeatedly questions the tactics and the competency of the McCain quest of POTUS.
Yet, the polls are close enough that a backlash is possible. In addition to the potential for having Democrats control all Washington, the public's hatred of the media in general, may cause a sympathy backlash for McCain. Remember this happened with Hillary, and she began winning nearly everything in sight. What stopped her wasn't Obama, it was the Democratic rules, and the Party's desire to have Obama at all costs.
This is an early warning to watch out for a McCain upset.