The American Civil Liberties Union and the ACLU of Arizona filed a federal lawsuit on July 10 aiming to stop Section 5 of Arizona’s Proposition 314 from ever getting off the ground. The complaint, brought on behalf of the Florence Immigrant & Refugee Rights Project, asks a judge for emergency relief in the form of a temporary restraining order and preliminary injunction, arguing that the provision would let Arizona build a state-level deportation system that conflicts with federal law. Plaintiffs say Section 5 would criminalize certain border crossings, authorize state and local officers to make arrests, and allow state judges to order removals. The filing lands just as a legal trigger tied to litigation in Texas has put the disputed provision on a fast-moving timeline.
According to ACLU, the complaint, filed as Florence Immigrant & Refugee Rights Project v. Mayes, argues that Section 5 would “establish an entirely separate and parallel detention and deportation system” that conflicts with federal immigration statutes. The groups contend that the provision violates the Constitution’s Supremacy Clause and would strip noncitizens of federal protections such as asylum and other defenses to removal. “Section 5 of Proposition 314 is a permission slip for local and state law enforcement to engage in blatantly unconstitutional acts like racial profiling, unlawful arrests, and illegal detentions,” Tara DeGeorge of the ACLU of Arizona said in the release.
Why enforcement could start now
As Arizona Daily Star reports, Prop. 314 contains a built-in trigger: Section 5 is written to take effect 60 days after a comparable law in another state becomes enforceable. A recent appeals court fight over Texas’ SB 4 and related filings has started that clock and created a window for Section 5 to kick in by mid July unless a federal judge steps in.
Legal precedent driving the challenge
Plaintiffs point to the Supreme Court’s 2012 decision in Arizona v. United States, which struck down major sections of SB 1070 as preempted by federal law and reaffirmed that immigration enforcement is primarily a federal responsibility. SCOTUSblog notes that the ruling remains the controlling precedent courts use when weighing state immigration laws against federal supremacy. Lawyers for the Florence Project argue that Prop. 314 tries to work around that doctrine by creating state criminal penalties and removal orders that duplicate federal authority.
What the lawsuit asks the judge to do
The complaint names Arizona Attorney General Kris Mayes as the defendant and asks U.S. District Court Judge Michael Liburdi for emergency injunctive relief to keep Section 5 off the books while the case moves forward. As reported by Davis Vanguard, the plaintiffs warn that without a court order the state could begin arrests and prosecutions under Section 5 even as the legal fight advances to higher courts. If the judge grants a preliminary injunction, enforcement would be put on hold pending a full decision on the merits; if not, the measure could take effect while appeals continue.
Legal implications and stakes
Court watchers say the judge will apply the familiar preliminary injunction test, looking at likelihood of success on the merits, irreparable harm, the balance of equities, and the public interest, and that preemption claims have carried weight in earlier challenges to state immigration laws. Supporters of Prop. 314 argue that the measure fills enforcement gaps they believe federal authorities have left open, while opponents warn it will invite racial profiling, mass detentions, and legal chaos for immigrants and local courts. The dispute echoes the litigation over Texas’ SB 4 and the Fifth Circuit’s recent procedural rulings that shifted the timeline for implementation, as outlined by the ACLU of Texas, highlighting how quickly these kinds of fights can reshape enforcement across states.
