Joshua David Hawley (born December 31, 1979) is an American politician and attorney serving as the senior United States senator from Missouri, a seat he has held since 2019. A member of the Republican Party, Hawley served as the 42nd attorney general of Missouri from 2017 to 2019, before defeating two-term incumbent Democratic senator Claire McCaskill in the 2018 election. He was reelected in 2024.