Congressional leaders were briefed a year ago on hacking of Democrats -sources

By Mark Hosenball and John Walcott WASHINGTON (Reuters) - U.S. intelligence officials told top congressional leaders a year ago that Russian hackers were attacking the Democratic Party, three sources familiar with the matter said on Thursday, but the lawmakers were unable to tell the targets about the hacking because the information was so secret. The disclosure of the Top Secret information would have revealed that U.S. intelligence agencies were continuing to monitor the hacking, as well as th