The US has not put the full brunt of its military force to action since the civil war era.
After WW2 the majority of their pacific fleet was in tip top shape and its Europe based military was the only self sufficient force still standing. They made so many spare boats, aircraft, trucks and engine parts that they supplied private industry and foreign military forces for decades afterwards. Much of the gear it uses today is verging on 50 years old because they've been working off of WW2 stock the whole time.
As far as manpower, its a nation of over 300 million now. I doubt it would be much trouble to have filled all those pre-made uniforms at any point.
If the goal of Korea, Vietnam, the Gulf war, or a hypothetical post WW2 conflict was to crush all opposition and make the world ready for an American empire then there is nothing logistically in the way of that plan.
Then theres the nuke advantage to consider.
Simple fact is that without an Emperor you can't have an Empire, and no one in the US is suggesting that they declare Bush president for life or anything of that nature (not forgetting the detail that Roosevelt (the president who ordered up the A-bombs) actually served more than two terms and his immediate successors could have twisted the presidency to be a de'facto dictatorship).
Yea Bush is not that great in the polls but... lets get keep some perspective here.
