US official: Hackers targeted election systems of 20 states

A Homeland Security Department official says hackers have targeted the voter registration systems of more than 20 states in recent months.The official was not authorized to speak publicly on the subject and spoke on condition of anonymity.The FBI last month warned state officials to improve their election security after hackers targeted systems in Illinois and Arizona.FBI Director James Comey told lawmakers this week that the agency is looking "very, very hard" at Russian hackers who may try to