(I wrote this article quite a few years ago. I feel that it's relevant now in light of the Oprah for President movement.)
Obama's political success was built on his ability to invoke values detached from belief systems. To break away symbols and ideals from religious and national value systems, and mix and match them into his own sound bites. Like the famous Hope poster, that mixed patriotic color schemes with socialist realism, or his own speeches which invoked the Founders in support of socialism.
The Obama wave was piggybacking on a culture where context had ceased to matter. Obama's image had more in common with the way hip hop artists sample songs, than with a symphony. His campaign was the perfect trailer to a movie that would never be released. It was the marriage of corporate advertising campaigns, pop culture, radical politics and Americana-- thrown together in a pot and boiled into one indecipherable mix that was appealing, and yet completely void of meaning.