Right, that's why we never went into Iraq. We have a government divided by the Constitution in which one part can't by itself go bad and drag the whole government with it. And so Congress, fulfilling its role according to the Constitution, wisely stood up to the president and prevented a foolish, wasteful, nationally destructive war.

Clearly, your argument is not only logical and true, but irrefutable.

All sarcasm aside, what's clear is that all it takes is a situation where for political reasons Congress and the opposition party are afraid to stand up to the president. No other country is powerful enough to hold us back, at most they can refuse to go along, which every significant second-tier power except Great Britain did. But that didn't stop us. And the fact that a list of third-tier non-powers gave token, meaningless assistance allows some people to claim (falsely, of course, but with some trivial surface justification) that it was an international effort.

I wish your argument was valid. I really do. It should be that way. But it isn't always, unfortunately.