“This town is now as nervous as it’s ever been.” That’s Congressman Chip Roy’s assessment of the mood in Washington, D.C., since President Trump’s return to the White House. It’s one of several dozen refreshingly blunt descriptions of American politics in Ned Ryun’s new documentary based on his book, American Leviathan. The documentary is available to anyone with an Internet connection, and it is nothing short of a declaration of war on the administrative state. I highlighted Ryun’s book when it came out last September for several reasons. First, it is a remarkably clear description of the ideas, people, and...