Now, you can always assume I only say this because I live in a poor country that everyone pushes around. But when we zoom out a bit, the same could soon apply to the entire continent. We are not united and that's bad for all of us because our competitors are more much bigger and better integrated.
Did you have something else in mind? I don't exactly pay any attention to US politics but I am sure their states are competing with each other because they have their own interests in mind. But that applies to cities too, does it not?