He's following Ross's advice:

The Obama campaign has no silver bullet to use against the Palin. Instead, Obama has decided to largely avoid directly engaging her and will instead keep his focus largely on John McCain and on linking the Republican ticket to President George W. Bush. The Obama campaign will leave Palin to navigate the same cycle of celebrity that Obama has weathered, and the same peril that her nascent image will be defined by questions and contradictions from her Alaska past.

Very shrewd and smart. She will come undone by herself. But the press needs to do its job and not be intimidated by the nutcases in the rightwing echo-chamber.

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