As I wrote last week, any serious strategy against ISIS has to prevent Jihadists with US citizenship from entering this country after getting training abroad. This is a lot harder than it should be since a series of Supreme Court decisions and State Department action have made what used to be a routine procedure into a process that is rarely used. “I therefore formally renounce my oath of office as well as any other implicit or explicit oaths I have made in the past … This includes my oath of U.S. citizenship,” Hasan declared.By his own admission, Nidal Hasan is...