A breakdown of the demographics of top congressional staffers, many of whom toil behind the scenes in relative anonymity. National Journal interviewed more than 300 top-level Congressional staffers for our special "Hill People" issue. These graphics represent a demographic breakdown of the staffers we interviewed. This graphic is part of National Journal's special Hill People issue. Every four years, National Journal devotes an entire magazine to profiling top congressional staffers, many of whom toil behind the scenes in relative anonymity.