This bill, the "Break the Chain Act," substantially revises family-sponsored immigration by redefining "immediate relatives" to exclude parents of U.S. citizens, limiting this category to only children and spouses of U.S. citizens. It eliminates most existing family-based visa preference categories, retaining only spouses and minor children of lawful permanent residents. The worldwide level of family-sponsored immigrants is also adjusted, with the annual cap reduced based on certain paroled aliens. The legislation introduces a new nonimmigrant W visa for parents of U.S. citizens aged 21 or older. This W visa status prohibits employment and public benefits, and requires the U.S. citizen child to petition for the parent and arrange for their health insurance coverage. Additionally, the bill tightens "aging out" rules, disqualifying an alien if they marry or turn 25 before a visa becomes available. Crucially, the bill invalidates all new and pending petitions for parents of U.S. citizens (as immediate relatives) and for the eliminated family preference categories. However, aliens with petitions approved under the old law by September 30, 2020, may still receive visas until the number of visas that would have been allocated to those categories in fiscal year 2025 under the prior law have been issued.