Who can amend a federal law?

The ability to amend a federal law lies primarily with Congress, as mandated by the U.S. Constitution. Congress consists of two chambers: the House of Representatives and the Senate. To amend federal legislation, a proposed change must usually be introduced, debated, and approved by a majority in both chambers. While the President does have a role in the legislative process, specifically in signing bills into law or vetoing them, the actual amendment of federal laws is a legislative power held by Congress.

This process reflects the system of checks and balances designed by the framers of the Constitution, where no single entity, including the President or the Supreme Court, has unilateral power to amend laws. State legislatures lack the authority to amend federal laws, emphasizing the federal nature of the legal system in which amendments to such laws must originate from federal representatives. Therefore, the option that identifies Congress, with the potential involvement of the President for approval, as the entity that can amend federal law is correct.