Stephen Miller -- like other Trump advisers such as Michael Anton, Sebastian Gorka and Steve Bannon -- is a white supremacist. Like other members of the so-called alt-right (a collection of far-right extremists that includes neo-Nazis, the Ku Klux Klan and other racists) Miller hides behind Trumpian slogans about making America great again and neutral-sounding terms such as "nationalism" and "populism" to advance a policy agenda where nonwhites are treated as second-class citizens and white people are empowered above all other groups.
In the age of television and now the internet, there are hundreds of thousands of hours of video and audio footage of every president widely available. There are also rumors and leaks from within the White House and other branches of government that can help paint a picture of a given president's moods, desires, thoughts and other behavior. What is to be done if this evidence collectively suggests that the president of the United States is mentally ill?