The Nuclear Family Priority Act aims to change the rules around family-sponsored immigration in the United States. Its main goal is to prioritize immediate family members of U.S. citizens and permanent residents while reducing the overall number of family-sponsored immigrants. One of the key changes in this legislation is the definition of "immediate relatives." The bill narrows this category to only include children and spouses, excluding parents from being classified as immediate relatives. Additionally, it alters the way family-sponsored immigrant visas are allocated.