Christ, Obama puts in some face-time at a UN Conference that had already gone off the rails and he's already threatening to be "more damaging to the international system than George Bush was?" First of all, the only damage that George Bush did to the "international system" was to make it more difficult for internationalist Americans like Sachs to go to UN cocktail parties. Second, if the Copenhagen Conference - with its star turns by Hugo Chavez and Al Gore denouncing technology and capitalism - is the international system at its best, as Sachs implies, then screw the system.
The real problem with Obama and other lib politicians is the amount of time they spend giving guys like Sachs hope that they support all of their brilliant ideas 100%, but the fact is that they are humoring them just long enough to get their support. That is usually the way of the Left.