.. if you are talking about Trump it will start a civil war the likes of which hasn't been seen for in the US  for 150 years.?   Millions of Trump supporters - many armed -  will take to the streets if they try to impeach him, convinced that the elitist in Washington they were were warned about  are now  trying to depose the democratically elected President they voted for by trickery and deceit having failed to do so  in the election..