In United States politics, a ranking member is the most senior member of a congressional or state legislative committee from the minority party.[1] On many committees the ranking minority member, along with the Chair, serve as ex officio members of all of the committee's subcommittees.
Both the United States Senate[2] and United States House of Representatives[3] use ranking members as part of their legislative structure.
When party control of a legislative chamber changes, a committee's ranking minority member is generally ensured to become the next chairman of the committee, and vice versa.[citation needed]