Perspective by Dan O’Donnell For more than a month now, Democrats and their allies in the media have been in a state of high dudgeon over the riot at the U.S. Capitol, which they have hysterically labeled the gravest threat to the republic since at least 9/11 and perhaps Pearl Harbor. In reality, their response to it—the utterly unconstitutional Senate trial of a private citizen—is a far greater threat to the long-term stability of American democracy than some jackass in Viking horns. The United States Senate has as much constitutional or legal authority to try Donald Trump this week as...