Senate Committee on Commerce, Science, and Transportation

Interstate commerce and transportation generally, communications, the Coast Guard, merchant marine and navigation, marine fisheries, coastal zone management, oceans, weather and atmospheric activities, nonmilitary aeronautical and space sciences, science and technology research, and regulation of consumer products and services.

Senate Committee on Commerce, Science, and Transportation has 28 members, made up of 15 Republicans and 13 Democrats. Ted Cruz chairs it. Maria Cantwell is the ranking member, which is the senior post held by the minority party. Senate committee seats are held for the length of a senator term, so membership turns over more slowly than in the House. The membership below is generated from the roster this site maintains against clerk.house.gov and senate.gov.

Jurisdiction source: Senate Rule XXV

How business reaches this committee

Senate Rule XXV lists the subjects above and assigns them here. A bill introduced in the Senate is referred to the committee whose Rule XXV jurisdiction covers its main subject, so measures on these topics start with this committee. From there it can hold hearings, amend the text, report the bill to the full Senate, or leave it alone, which is what happens to most bills.

Subcommittees

The committee divides its work among 6 subcommittees:

  • Subcommittee on Aviation, Space, and Innovation
  • Subcommittee on Coast Guard, Maritime, and Fisheries
  • Subcommittee on Consumer Protection, Technology, and Data Privacy
  • Subcommittee on Science, Manufacturing, and Competitiveness
  • Subcommittee on Surface Transportation, Freight, Pipelines, and Safety
  • Subcommittee on Telecommunications and Media

Who serves on it

28 senators sit on the committee: 15 Republicans and 13 Democrats. That gives the majority 15 of the 28 seats. Ted Cruz is the chairman. Maria Cantwell is the ranking member. They come from 28 states.

Following its work

Hearing notices, markup schedules, witness lists and published reports live on the committee’s own site, linked at the top of this page. The full member list below links to each member’s page here, with contact details and the seat they hold. For background on how seats and chairs are handed out, read How congressional committees work. For what happens to a bill after a committee reports it, read How a bill becomes law. To look up who represents a particular place, start at U.S. senators by state.

Members

28 members. Generated from the roster this site holds, checked against the Clerk of the House and the Senate committee lists on September 26, 2026.

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