The lawmaking body that forms a part of the legislative branch of the US government is the Congress. The Congress is the greatest lawmaking authority in the United States. It is a bicameral institution consisting of two chambers: the House of Representatives and the Senate. Here's a breakdown:
1. **House of Representatives**: This chamber of Congress has 435 members, with each member representing a specific congressional district based on population. The number of representatives per state is determined by its population.
2. **Senate**: The Senate consists of 100 senators, with each state electing two senators regardless of population size. Senators serve six-year terms.
Together, the House of Representatives and the Senate make up the US Congress, the primary lawmaking body responsible for creating and passing federal legislation in the United States.