WASHINGTON — Americans following this year's presidential campaign would never know it from mainstream media coverage, but the commander in chief we hired four years ago has set the United States on a course for unilateral disarmament. The following people hope you won't notice until after Nov. 6: Vladimir Putin, Liang Guanglie, Kim Jong-un, Ashfaq Parvez Kayani, Sayyed Ali Hosseini Khamenei, Abdul Fattah al-Sisi, Recep Tayyip Erdogan, Salman bin Abdulaziz al-Saud, A.Q. Khan and of course, Barack Obama. The 10 individuals above share a common fascination: nuclear weapons. Vladimir Putin, Russia's modern czar; Liang Guanglie, minister of national defense for...