In 2008, I wrote a book, The End of America: Letter of Warning to a Young Patriot. I warned, based on my study of closing democracies in 20th century history, that America needed to beware of a slide toward totalitarianism. I warned that would-be tyrants, whether they are on the left or the right, always use a map to close down democracies, and that they always take the same ten steps. Whether it’s “Invoke a Terrifying Internal and External Threat,” “Create a Thug Caste,” “Target the Press,” or the final step, “Suspend the Rule of Law,” these steps are always...