There is a fascinating, if not eerie, precedent to the turbulent political times in which we are living. There was a time in our nation’s history when the president’s opponents thought him the personification of evil and a tool of a foreign government, when friends shunned one another socially because of differing political views, and when people dressed in outlandish costumes and took their protests to the streets and the halls of Congress. It was a time when the nation was more divided than it has ever been since our founding, and that includes the Vietnam War.