Rep. Nancy Mace, R-S.C., said she was physically accosted on Capitol grounds Tuesday night, and the suspect has since been arrested. The U.S. Capitol Police said that just before 6 p.m. the office of a member of Congress, later identified as Mace, reported an incident in the Rayburn House Office Building. House division officers and agents with the Threat Assessment Section of the police department tracked down the suspect, identified as 33-year-old James McIntyre of Illinois.