T.J. Cox is an American politician and businessman who served as a member of the U.S. House of Representatives from California's 21st congressional district from 2017 to 2019. He is a member of the Democratic Party and has a background in engineering and business, focusing on community development and economic growth. Before his time in Congress, Cox was involved in various business ventures, including work in the construction and real estate sectors. He has also been active in local politics and community service, advocating for issues such as healthcare, education, and infrastructure improvements in his district.