For the 36th episode of "Reading the Art World," host Megan Fox Kelly speaks with Sarah Roberts, curator of the landmark exhibition "Amy Sherald: American Sublime," and editor of the accompanying catalog published by Yale University Press in association with the San Francisco Museum of Modern Art. Roberts discusses Sherald's revolutionary portraiture approach — from her distinctive gray-scale skin tones that shift focus to her subjects' interior lives, to her deliberate use of clothing and se...