By the middle of the 2026 legislative session, Local Solutions Support Center (LSSC) tracked nearly 850 abusive preemption bills across states currently in legislative session.

This white paper tells the powerful and timely story of how abusive preemption has paved the way for the rise of federal authoritarianism – and how preemption is now being used to implement that agenda.

A look at how the Local Solutions Support Center has tracked abusive preemption bills – in 25 states – that attack local authority on immigration policies in the 2025 legislative session.

Rick Su, Professor of Law at the University of North Carolina School of Law, has written a new white paper for LSSC that charts the growth and evolution of immigration-related preemption measures in recent years.

Increasingly, some state lawmakers have enacted preemption laws that make it difficult for cities to offer immigrants sanctuary status.