host: danielle douglas-gabriel, she couplers higher education for the washington post. u for being with us. danielle: thank you for having me. host: coming up we will turn our attention took covid-19 and talked to howard markel with the university of michigan to give us history on the idea of vaccination passports with the center of the history of medicine. c-span's washington journal continues in a moment. ♪[washington journal theme plays] announcer: today, closing arguments in the derek chauvin trial. watch live coverage at 10:00 a.m. eastern on c-span two, on live on c-span.org, or listen on the c-span radio app. live coverage at 8:00 p.m. eastern on c-span two. listen to c-span's podcast "the weekly." this week house majority whip james clyburn chair of the congressional black caucus talks about the history of the group and its priorities moving forward. rep. clyburn:: stay in touch with the dreams and aspirations of the people who look to you for leadership, not necessarily who you may represent. i'm the only african-american in the congress from south carolina , bu