I do not want to appear rude or insensitive to anyone's point of view or belief system but I would like to answer from my perspective. I do not personally believe in the concept of tribulation as put forth by many religious institutes or such books as "Left Behind." I would like to approach this from a philosophical stance however.
If I am wrong and god does choose to judge humanity I do not think any nation would be free from his wrath. Based on the teachings of the bible we would nearly all be considered sinners and we would feel his wrath. America is the opposite of meekness; we are full of greedy & privileged individuals with selfish mindsets and actions. Even our poorest citizens are wealthy by earthly standards and they are just as greedy as the rich CEO's and Politicians.
To follow the way of Jesus one would work hard but only keep what was absolutely necessary. One would live in the cheapest shelter they could afford and would eat for nourishment. All excess income would be used to make the world a better place. I have met thousands of Christians and though many give their church 10% because the bible says to they do not sacrifice for their fellow humans in the way Jesus would have wanted them to.
I am not judging anyone I know that I am a sinner and I am selfish. I am far from a saint so if this tribulation comes to pass I will probably burn. It will be what it is I am not going to trip off of it.