Michael Thomas McCaul Sr. (born January 14, 1962) is an American politician, attorney, and a member of the U.S. House of Representatives for Texas's 10th congressional district since 2005. A member of the Republican Party, he chaired the House Committee on Homeland Security during the 113th, 114th, and 115th Congresses. His district stretches from Austin to Houston. McCaul became the chair of the House Foreign Affairs Committee in the 118th Congress in 2023.