The U.S. Senate Committee on Commerce, Science, and Transportation is composed of 27 Senators and led by Committee Chair Maria Cantwell, D-Wash., and Ranking Member Ted Cruz, R-Texas.

Under their leadership, the committee is composed of seven subcommittees, which together oversee for the vast range of issues under its jurisdiction. These issues range from communications, highways, aviation, rail, shipping, transportation security, merchant marine, the Coast Guard, oceans, fisheries, weather, disasters, science, space, interstate commerce, tourism, consumer issues, economic development, technology, competitiveness, product safety, and insurance.