A federal judge on Tuesday sentenced a man to 13 months in prison on charges connected to a threat to kill a congressional staff member and more than 12,000 phone calls to dozens of congressional offices, both in Washington and home districts across the country. The defendant, Ade Salim Lilly, pleaded guilty in May to two federal counts — interstate communications with a threat to kidnap or injure, and repeated telephone calls — and plea documents said Lilly at times used vulgar and harassing language. In one incident, Lilly reportedly told a congressional staffer: “I will kill you, I am...