A federal judge in Austin blocked Texas SB 4's state-run deportation provisions, ruling the law is preempted by federal immigration authority under the Supremacy Clause.
U.S. District Judge David Ezra issued a preliminary injunction on May 14, 2026, blocking major provisions of Texas Senate Bill 4, a state law that would have authorized Texas law enforcement officers to arrest and deport individuals suspected of unlawful entry into the United States [1]. Judge Ezra found that SB 4 was preempted by federal immigration statutes and that Texas had improperly encroached on the federal government's exclusive authority over immigration enforcement [1]. The ruling halts enforcement of the law's core removal mechanism pending further litigation.
The case arises from a class-action complaint filed May 4, 2026, by the American Civil Liberties Union, the ACLU of Texas, and the Texas Civil Rights Project in the U.S. District Court for the Western District of Texas [2]. The plaintiffs challenged SB 4 on constitutional and statutory grounds, arguing that the law's arrest-and-deportation framework violated the Supremacy Clause by substituting state officials for the federal immigration enforcement apparatus Congress established [2]. Texas, as the defending party, argued the law was a permissible exercise of state police power in the face of federal inaction at the southern border.
The injunction carries substantial doctrinal weight. Federal courts have long held that immigration enforcement, including the power to remove noncitizens, is committed exclusively to the federal government under the Constitution and the Immigration and Nationality Act. Judge Ezra's ruling applies that framework directly to SB 4's removal provisions, drawing a line between state cooperation with federal authorities, which courts have generally permitted, and state-directed deportation, which this ruling treats as categorically different [1]. The decision echoes structural concerns raised in earlier Supreme Court precedent addressing state immigration statutes, though the specific provisions here present novel removal-power questions.
What comes next will determine the decision's staying power. Texas is expected to appeal to the U.S. Court of Appeals for the Fifth Circuit, a tribunal that has shown receptivity to state arguments in immigration-adjacent disputes [1]. The Fifth Circuit's disposition of the appeal, and any subsequent petition to the Supreme Court, will mark the next inflection points. Separately, portions of SB 4 not reached by the injunction may remain operative, and the state legislature may attempt to reframe surviving provisions to satisfy constitutional requirements [2]. Litigants and observers should track whether the federal government files any position on the preemption question, as the executive branch's stance could complicate or clarify the appellate record.