(Reuters) – A suspicious package delivered to the home of U.S. Senator Rand Paul on Monday and reported to law enforcement had a powdery substance, which was found to not be dangerous in preliminary analysis, authorities said. “The person who found the letter called the local sheriff’s office. The USCP (United States Capitol Police) and FBI were also notified. An initial test determined the substance is not dangerous”, the Capitol Police said in an emailed statement on Tuesday. The police said that the substance was taken to a lab for further testing. “I take these threats immensely seriously….