Sen. Rand Paul was supposed to be a more politically savvy version of his father, former Texas congressman and presidential candidate Ron Paul. The senior Paul energized a subset of the Republican Party, but the younger Paul was supposed to be a more mainstream advocate for limited government and a non-interventionist foreign policy. The Kentucky senator has even been touted as one of the leading candidates for the 2016 Republican presidential nomination. Yet time and again, he has shown why he shouldn't be taken seriously. The latest controversy surrounding Paul, which has been detailed in a series of stories at...