Interesting post. The only issues I have with what you are saying is that you are suggesting that Obama (singular) is responsible for the message. I disagree with that. Obama was progressive in hiring a team of leaders that reached out to the po-mo's. I do not think you can call Obama postmodern until his decisions as a leader warrant it. Right now it is merely marketing. His team marketed well to po-mo's.
The proof will be in the pudding (and by pudding I mean leading in a new and effective manner). Obama will prove to be a post-modern president when we leads in a non-modern fashion. That is yet to be see. Probably yet to be invented. It will be interesting to watch, though.
Shane--Glad to have you on board! But, where is the love? You should at least ping me when you dump this post in your site. Think of the big picture, man!