Why have I been so angry/upset at the US Government for the last 8 years?

This NY Times Op-Ed piece states it very well. Here is the best expression of my feelings I have seen:

That is why I am thankful above all that the next U.S. commander in chief is a constitutional lawyer. Nothing has been more damaging to the United States than the violation of the legal principles at the heart of the American idea.

Thanks Roger Cohen!