Senate on high alert as mystery letters with unknown substance target Congress

Letters containing “suspicious substances” have turned up at Senate offices and election offices nationwide, prompting a federal investigation just three weeks before the midterm elections.A notice from the Senate Sergeant at Arms, reported by Punchbowl News, told Senate offices Thursday that the U.S. Postal Inspection Service, the FBI and the U.S. Capitol Police were investigating multiple letters mailed nationwide, “including multiple Congressional offices.” The letters...