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 who previously resided in Raleigh, The News and Observer reported

"Following weeks of threatening bombing references, attempts to locate the school Walker’s daughter attends, and mentions of his family and home address, our staff submitted the messages to Capitol Police,” Walker campaign spokesman Jack Minor said in a statement.