A century and a half ago, a Republican president presided over a country torn by civil war.  The trigger was a dispute over the rights of black people. Abraham Lincoln took office just as the war started. His presidency was a successful struggle to hold the United States together. History considers Lincoln one of the best presidents.

Today, another Republican president presides over a country divided. A full scale civil war has not broken out (yet), but wide scale civil unrest has, with the trigger again the rights of black people. Unlike Lincoln, Donald Trump was in office for years before the unrest started. His presidency has been a constant and successful effort to foster divisions between Americans.

How will history regard Trump?

He probably does not care.