The Officer Is Going to Ask You This. Here's Everything You Need to Know About the Three Branches of Government.

You're sitting across from the USCIS officer. You've been studying for weeks. And the first civics question lands: "Name one branch or part of the government."

You know this one. But for a half-second, your brain runs through the options — Congress? Legislative? Senate? Executive? — and wonders which answer is actually right.

All of them are. But knowing why, and knowing the full picture of how the three branches connect, is what separates someone who answers confidently from someone who hesitates on the questions they should have locked in.

The three branches of the US government are the legislative branch (Congress — makes the laws), the executive branch (the President — enforces the laws), and the judicial branch (the courts — reviews the laws). The entire System of Government section of your civics test — questions 13 through 47 — flows from this structure.

Why Three Branches?

The Founders had just escaped a system where power concentrated in a single authority — the British Crown. They designed the US government specifically to prevent that from happening again. Their solution: divide power into three separate branches, give each branch specific responsibilities, and build in mechanisms for each branch to limit the others.

That system is called checks and balances. It's not just a concept — it's how every major government action actually works.

The Legislative Branch: Congress Makes the Laws

Congress is the legislative branch. It's the branch that writes and passes federal laws. Congress has two chambers — the Senate and the House of Representatives — which together make up the US legislature.

The Senate has 100 members — two senators from each of the 50 states. They serve six-year terms. The Senate is designed to give every state equal representation regardless of population.

The House of Representatives has 435 voting members. House seats are distributed by state population — larger states have more representatives. Representatives serve two-year terms, which means every House seat is up for election every two years.

The Executive Branch: The President Enforces the Laws

The executive branch carries out and enforces federal laws. The President leads the executive branch as head of state and Commander in Chief of the military. The President is supported by the Cabinet — a group of advisors who lead the major federal departments.

The President doesn't just enforce laws — the President also has the power to sign bills into law or veto them. A presidential veto sends a bill back to Congress; Congress can override a veto with a two-thirds majority in both chambers. That's checks and balances in action.

The Judicial Branch: Courts Interpret the Laws

The judicial branch interprets laws and decides whether they comply with the Constitution. The Supreme Court is the highest court in the United States — its decisions are final and binding on all lower courts. There are nine justices on the Supreme Court, including the Chief Justice.

The judicial branch's most important power is judicial review — the authority to strike down a law as unconstitutional. This is a check on both Congress (which passes laws) and the President (who signs them). No branch operates without limits.

Federal vs. State Powers

The civics test also asks about the division of power between the federal government and the states. Some powers belong exclusively to the federal government. Others belong to the states. The Constitution defines this split.

How to Answer These Questions at Your Interview

The System of Government section is the largest in the civics test. It covers 35 questions (Q13–Q47) — more than a quarter of the entire 128-question pool. You will almost certainly get asked at least one question from this section. Probably more.

The good news: most of these answers are short and specific. "The President." "Congress." "The Supreme Court." "Checks and balances." The hard part isn't the content — it's retrieving a specific answer under mild pressure when someone is watching and writing it down.

Read the structure. Understand why it exists. Then practice saying the answers out loud — because that's what the interview actually measures. FutureCitizen.us is a free AI simulator that asks you the real USCIS civics questions one at a time, out loud, exactly the way the officer will. It's the closest preparation you can do before the real thing.