When I worked in the George W. Bush White House, and traveled to certain foreign countries with the president, we were required by the Secret Service to remove the batteries from our BlackBerrys, place them in a sealed plastic bag, and leave them on Air Force One for the duration of our visit to prevent foreign adversaries from hacking into the White House email system. But Clinton was so cavalier that she actually used not her government communications device, but her unsecured private email to communicate directly with the president of the United States from the territory of a foreign adversary. By emailing Obama directly from hostile territory, she put both her own email system and the president’s at risk of foreign intrusion.