Patrick Hipes Executive Managing EditorThis Is Us star Sterling K. Brown is playing the role John Spencer made famous on The West Wing for the show’s election-themed reunion special that will air October 15 on HBO Max.Spencer played Leo McGarry, the loyal and demon-battling Chief of Staff to Martin Sheen’s President Bartlett, on 155 episodes of Aaron Sorkin’s political drama, which was tied with Hill Street Blues for the most Emmys before Game of Thrones came along.