Federal Judge Blocks Texas Immigration Law Hours Before Enactment

Texas SB 4 was one of the most expansive state-level immigration enforcement measures in recent years, granting state police authority to arrest individuals suspected of unauthorized border crossing - powers that opponents argued are reserved exclusively for the federal government. Immigration enforcement has long been treated as a federal domain under the Supremacy Clause of the U.S. Constitution, and preemption arguments have been central to prior challenges against state immigration statutes. The Biden administration and civil liberties organizations had opposed the law on both constitutional and civil rights grounds. The federal injunction pauses enforcement while litigation proceeds, leaving the broader constitutional questions unresolved.