A U.S. Senator is one of two members who represent an entire state in the U.S. Senate. There are 100 senators, two from each state, no matter how many people live there. Senators serve six-year terms, and the job covers writing and voting on laws, confirming many of the President’s appointments, approving treaties, committee work, and helping people across the whole state.
Making and voting on laws
Like House members, senators introduce bills, debate them, and vote on them. A bill has to pass both the Senate and the House in the same form before it can become law. The Senate has its own rules, including extended debate that can require 60 votes to bring a bill to a final vote. Each senator’s vote carries weight, since the Senate has only 100 members. For how the two chambers compare, see House vs Senate: What’s the Difference?
Confirming appointments and approving treaties
The Senate has powers the House does not. It confirms many of the President’s nominees, including federal judges, Supreme Court justices, Cabinet secretaries, and ambassadors. A nominee usually needs a majority vote to be confirmed. The Senate also approves treaties with other countries, which takes a two-thirds vote. These powers give the Senate a direct role in shaping the courts and the executive branch.
Committee work
Most of the detailed work happens in committees. Senators sit on committees that handle areas like the armed services, the judiciary, finance, and foreign relations. In committee, they study bills, question witnesses in hearings, and rewrite proposals before the full Senate votes. A seat on a committee that matters to a senator’s state gives that senator more say over the policies that affect the people back home.
Representing the whole state
A senator represents the entire state, not a single district. That means a senator’s office handles concerns from every part of the state, from large cities to rural areas. Senators and their staff do casework, helping residents who are stuck with a federal agency, and they weigh statewide interests when they vote. Because the term is six years, senators are meant to take a longer view than House members, who face the voters every two years. For the House side of this, see What Does a U.S. Representative Do?
The six-year term
Senators serve six-year terms, and the terms are staggered so that about one-third of the Senate is up for election every two years. The Senate never turns over all at once, which gives it more continuity than the House. In most election years, only one of a state’s two seats is on the ballot.
Why each state has two senators
Every state elects two senators, no matter its size. This was a compromise written into the Constitution so that small states and large states would have equal weight in one chamber of Congress, while the House is divided by population. The result is that a state with a few hundred thousand people has the same number of senators as a state with tens of millions. It is one of the main ways the Senate differs from the House, and it shapes how national debates play out.
Casework for the people back home
A large share of a senator’s office work is casework: helping residents who are stuck with a federal agency. Staff assist with delayed passports, veterans’ benefits, Social Security questions, immigration cases, and tax problems. This service does not make headlines, but for many people it is the most direct help they ever get from their senator. Offices in the home state handle much of this day to day.
Oversight of the executive branch
Senators do not only write laws. Through their committees they watch how federal agencies spend money and carry out the law, hold hearings to question officials, and can demand documents and testimony. Because the Senate also confirms top officials, it keeps a check on the people it approved. This oversight role is a major part of how Congress holds the executive branch accountable between elections.
Why one senator can carry weight
The Senate gives individual members more power than the House does. A single senator can place a hold on a nomination or a bill, and the 60-vote threshold means a small group can shape or stall legislation. As a result, a senator who is willing to break from their party can have outsized influence on what passes. This is one reason a state’s two senators are closely watched on big votes.
A statewide voice on national issues
Because a senator represents an entire state, the job often carries a national profile. Senators weigh in on foreign policy, federal courts, and major economic questions that reach well beyond local concerns. Many use the seat as a platform on issues that affect the whole country. The wide constituency, six-year term, and small size of the chamber all push the role toward national debates.
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Last updated June 18, 2026.
