At the moment the US has a huge PR problem. People outside its borders generally don't like it. Why? George Bush and a bullying "do as we tell you, not as we do" big stick being waved. I think Obama has the ability to make the US back into one of the most well liked nations again. It'll take a while, and a lot of hard work, but he can do it. His biggest problem will be whether he kowtows to certain lobby groups within the US political system.