More than three dozen members of the U.S. Congress have received envelopes containing white powder in recent weeks, just days before the November 3 midterm elections, as federal investigators work to determine the source of the campaign. The most recent incident involved Virginia Democrat Suhas Subramanyam, whose district office in Leesburg was evacuated on Monday after an envelope with a suspicious substance was delivered. Subramanyam stated that the office was cleared promptly and emphasized that political intimidation has no place in the country. Law enforcement officials have not identified a suspect or motive, and no injuries have been reported. The powder has been sent to laboratories for analysis, and the incidents are being treated as potential acts of harassment rather than threats of violence.