Impeachment: USAToday

Over the course of his adult life, Trump has always been deeply afraid of two things: being humiliated and being laughed at. In this respect, impeachment is a nightmare, because it has brought both upon him in buckets. His dishonesty, selfishness, sleazy personal life and all the rest has always fueled contempt by anyone with a conscience and ability to think objectively. But this, this is different. This is contempt for the history books.  

Besides doing something deeply corrupt with trying to get favors from a foreign government  against a political opponent.