Members of the United States Congress are elected directly by the voters in their respective states and districts.

• House of Representatives: Members are elected every two years by voters in single-member congressional districts apportioned to each state based on population. Each state has at least one representative, and the total number of representatives is fixed at 435. Voters in each district choose their representative through direct elections held on Election Day in even-numbered years. To be eligible, candidates must be at least 25 years old, have been a U.S. citizen for seven years, and live in the state they represent

• Senate: Each state elects two senators at-large (statewide) for six-year terms, with elections staggered so that approximately one-third of the Senate is up for election every two years. Senators must be at least 30 years old, have been a U.S. citizen for nine years, and reside in the state they represent. Voters across the entire state directly elect senators during federal elections

In summary, the electorate—registered voters in each congressional district for the House and in each state for the Senate—choose their members of Congress through direct elections held every two years, with the House fully elected each cycle and the Senate elected in staggered thirds