What upheld the rights of states to nullify a law?

The concept of states' rights to nullify Federal Laws is rooted in the principle of state sovereignty and the idea that the Constitution is a compact among states. This notion was notably articulated in the Kentucky and Virginia Resolutions of 1798, where Thomas Jefferson and James Madison argued that states could invalidate federal laws deemed unconstitutional. While the Supreme Court has generally upheld federal supremacy, the debates surrounding nullification have influenced discussions on states' rights throughout American history. Ultimately, the legal foundation for nullification remains contentious and is not widely accepted in contemporary jurisprudence.