Basically Obama is the joker in the pack. He has no understanding of the problems, he has no answers, he has no connection to US antiquity, and if he had any, he has taken pain to cut them, and to disclaim them, and he has consistently tried to connect the US to low class social systems all round the world, as if this action would lead him to be acclaimed a world leader. He is just a joker and a person with nothing to contribute on his own, other than a lot of rhetoric, standing on a false platform created by his black skin. However his claims to black skin is also only skin deep.
The US is going to face a lot of problem, in years to come, and its citizenry will have a lot of trouble to get out of the strangling hold of other third rate nations like India, China, who are all trying to show off an equality to the US by daring to bully US citizens with equanimity and impunity.
The greatest problem with regard to US social system would the issue of 'equality'. With the free entry of people from feudal language nations like India, China, and other Asian/ African and certain Continental European nations, the issue of equality will become quite bewildering. For, in these feudal languages, even in common conversation, there will be huge canyons created in the social structure, with a huge lot of people simply going down to the level of abominable dirt. And a few reaching out to majestic heights. The social landscape will change, and change horribly it will.