Samuel Dale Brownback (born September 12, 1956) is an American attorney, politician, diplomat, and member of the Republican Party who served as the United States Ambassador at Large for International Religious Freedom from 2018 to 2021. Brownback previously served as the Secretary of Agriculture of Kansas (1986–93), as the U.S. representative for Kansas's 2nd congressional district (1995–96), as a United States senator from Kansas (1996–2011) and the 46th governor of Kansas (2011–18). He also ran for the Republican nomination for President in 2008.