If Washington, D.C. were the drowsy southern town that Warren Harding and Calvin Coolidge rode into, Ron Paul would have a chance. Washington’s not like that nowadays, though. It is a vast megalopolis, every nook and cranny stuffed with lobbyists, lawyers, and a hundred thousand species of tax-eater. The sleepy old boulevards of the 1920s are now shadowed between great glittering ziggurats of glass and marble, where millions of administrative assistants to the Department of Administrative Assistance toil away at sending memos to each other. Few of these laborers in the vineyards of government do anything useful. (In my experience...