Rep. Mark Walker's (R-N.C.) office said this week that it reported Twitter messages from a supporter of his Democratic opponent to Capitol Police to investigate. Staff for Walker, the chairman of the powerful Republican Study Committee, said they asked for Capitol Police to investigate after the North Carolina Republican’s campaign received continuous threatening messages from a supporter of his Democratic opponent. The person behind the tweets – which included the "bomb" emoji and an attempt to track down information about the congressman’s daughter’s school and whether it was public or private – was identified as Andrew Cabaccang, a Montana-based man...