Watching the Senate hearings over the past weeks I am happy to see historical arguments being made by both sides. As I have said, the Constitution is purposely vague, and it is no different when it comes to impeachment. There are three sections in the Constitution that discuss impeachment, but even with those sections there are still many questions. As with most Constitutional issues, the rest has been filled in with laws, the courts, and especially precedent. Several times both sides have referenced both the Andrew Johnson and William Clinton impeachment trials In this vein, I think it is worth examining the lesser known of the two, the Johnson case, to see what we can learn from history and if there are similarities between the two.