The fall of 2013 brought Obama additional challenges in the area of foreign relations. In October 2013, German Chancellor Angela Merkel revealed that the NSA had been listening in to her cell phone calls. "Spying among friends is never acceptable," Merkel told a summit of European leaders. In the wake of these controversies, Obama saw his approval rating drop to a new low in November 2013. Only 37 percent of Americans polled by CBS News approved of the job he was doing as president, while 57 percent disapproved of his handling of the job.