By Niels Lesniewski and Katherine Tully-McManus and Kellie Mejdrich and Tom Williams and D.A. Banks

Getting quickly from one part of the sprawling Capitol Building to another has always meant negotiating a labyrinth of stairwells and hallways, but these days more places tend to be off-limits due to security concerns at a moment’s notice. Four CQ and Roll Call journalists talk about how critical access to lawmakers is becoming more of a challenge.