The administration was against the 9/11 Commission for a very good reason - they saw it would become the political and substance-free circus it did, in fact, become. Moreover, the examples Edwards is giving aren't very convincing as flip-flops. A presidential challenger has the latitude to change his mind on a whim. The incumbent has the responsibility to weigh what each choice means. I think that's made evident, here; Bush or his advisors have had to make tough decisions, often where either choice sucks to some degree. Kerry hasn't seemed to have principle or reason behind his changes of mind.