Congress
Definition
The legislative branch of the United States government, comprising the Senate and the House of Representatives.
Explanation
Congress is the primary legislative authority in the United States, responsible for making federal laws. It is divided into two chambers: the Senate, which has 100 members with 2 senators from each state, and the House of Representatives, which has 435 members apportioned among states based on population. Both chambers must approve a bill for it to become law. Congress also has powers to regulate interstate and foreign commerce, levy taxes, establish federal courts, and declare war. The structure with two chambers is called a bicameral legislature.
Why this matters for your test
Congress is fundamental to understanding the U.S. government structure. USCIS civics questions test your knowledge of Congress's composition, powers, and role in the legislative process.
Source: USCIS 128 Civics Questions (2025)