-if the cost was millions of lives, concentration camps, use of nuclear/chemical/biological weapons, increase in terrorism and all the other assorted problems
That's what trust is all about.
The US would NEVER do anything such...It would already be done.
On top of that,the congress would never approve any of those behaviors and would impeach the president before anything could be even attempted.
Who do you think GWB is...Hitler?
Just remember that you're standing on a planet that's evolving
And revolving at nine hundred miles an hour!