The question of what restroom a transgender person should use has become a national debate. Kathryn Anthony, an Association of Collegiate Schools of Architecture Distinguished Professor of architecture at the University of Illinois, has testified before Congress on the issue of gender parity in public restrooms in federal buildings. Anthony, also the author of “Designing for Diversity: Gender, Race, and Ethnicity in the Architectural Profession,” talked about potty politics with News Bure...