Congressional Quarterly (http://www.cq.com)
Congress Watch (http://www.publiccitizen.org/congress)
North American Rail Alertness Partnership (http://www.narap.org)
Progressive Railroading (http://www.progressiverailroading.com)
Railway Age (http://www.railwayage.com)

Roll Call (http://www.rollcall.com)
Traffic World (http://www.trafficworld.com)