What the ITU says is really quite irrelevant.
An "open and free internet" to the americans means "an internet we control". As if they're somehow the guardians of all that's good and right. Well, they're not. They don't even manage to keep close tabs on their own TLAgencies, they do start several wars in response to relatively minor incidents, and so on, and so forth. In short, they're hypocrites, the worst kind of. It doesn't matter that other countries may or may not be worse; they say they're the best and other countries look at them and say "hey, we can do that". So there is and will be a big push to get more government control into them tubes of teh intarwebz. They may not know exactly what it is, but it's powerful enough to want a piece of the governance pie.
The only real way for the USoA Congress to stop this push, or at least take the sting out of it, is to put the thing out of reach of everyone's grasp, including their own. That last bit is absolutely necessary. The why I'll leave as an excercise, it shouldn't be hard to see for political players at that level (if not, what're they doing there?), the how I'll happily explain to them congresscritters should they care enough to ask. They have the means, but do they have the will?