Supremacy Clause
Subsequent federal case law

LULAC v. Wilson was brought to the Supreme Court in order to determine the constitutionality of California's Proposition 187, which the League of United Latin American Citizens argued was preempted by the federal government's authority over the regulation of foreign nationals in America. Proposition 187 was meant to assist cooperative efforts undertaken by national and sub-national governments to place stricter restrictions on undocumented immigrants "from receiving benefits or public services in the State of California". The Court decided that only a small portion of Proposition 187 was not preempted by the Personal Responsibility and Work Opportunity Reconciliation Act of 1996.
oulipo:avoid_letter[o], keywords:forbidden_words