No point arguing about conscripting young Americans into the army would make it possible to carry ion the warin Iraq to some kind of victory.

It won't happen.

Assume that it is true that a massive increase in the size of the occupation army would succeed over a number of years in bringing about a regime in power in Iraq that wouldn't collapse as soon as the troops were pulled out.

Even assunming that, the impact on America at home rules it out. It'd tear the country to pieces. It'd be the anti-war movement from the Sixties, but multiplied many times over. No politician is going to risk it.