In his latest opinion column for the Baltimore Sun, UMBC political science professor Thomas F. Schaller takes on accusations surrounding the recent U.S. Department of Homeland Security purchase of large quantities of ammunition (up to 1.6 billion rounds in some reports)—including claims that the Obama administration is arming itself while simultaneously trying to disarm the citizenry through gun control legislation. In researching the purchase, Schaller found: It turns out the order is closer to 750 million rounds and covers a five-year period and the 70,000 federal officers who require firearm certification or retraining. That’s roughly 2,200 rounds per officer per …