Arizona Senate Republicans escalated Arizona’s latest immigration-enforcement fight this week by asking Attorney General Kris Mayes to review whether Pima County’s new anti-ICE policy violates state law — a move that could turn a local dispute into a statewide test of how far counties can go in resisting federal immigration activity on public property. The complaint, filed by Senate President Warren Petersen, President Pro Tempore T.J. Shope, and Majority Leader John Kavanagh, is now listed by the Attorney General’s Office as an open SB 1487 investigation involving Pima County Resolution No. 2026-10. Under that process, the attorney general has 30 days to issue a written finding. 

The filing puts Pima County on a track that closely mirrors the Arizona Globe’s reporting on the separate but related Pinal County battle between County Attorney Brad Miller and the Pinal County Board of Supervisors. In that case, the Globe reported that the board sued after Miller entered a 287(g) agreement with federal immigration officials, arguing he lacked the authority to do so without board approval. A judge later moved the case to Maricopa County, but the central question remained the same: who controls county-level cooperation with federal immigration enforcement, and where does local authority end? 

Pima County’s posture is different, but the underlying conflict is strikingly similar. In February, the Pima County Board of Supervisors voted 4-1 to approve measures aimed at limiting immigration enforcement on county property and opposing a proposed ICE detention center in Marana. According to Tucson Spotlight’s report, the board directed staff to draft an ordinance protecting county property from use in immigration operations, with supporters arguing the steps were necessary for public safety, dignity, and community trust. Senate Republicans now argue the policy runs headlong into A.R.S. § 11-1051(A), which says no county or other political subdivision may “limit or restrict the enforcement of federal immigration laws to less than the full extent permitted by federal law.” 

That makes the Legislature’s involvement more than symbolic. SB 1487 gives lawmakers a preemption tool with real teeth: if the attorney general concludes a county violates state law and does not cure the violation, state-shared revenue can be withheld; if the policy “may violate” state law, the matter can be fast-tracked to the Arizona Supreme Court. 

The likely impact is that the Pima County fight will become less a local policy debate and more a precedent-setting state power struggle. That is an inference based on the statute and on the Globe’s reporting from Pinal County: once immigration disputes move from board chambers into formal legal review, they tend to become fights over statewide authority, not just county discretion. If Mayes finds even a possible violation, the pressure on Pima supervisors to revise or narrow the measure will rise sharply. If she declines to act aggressively, Republicans will almost certainly use that response to intensify their broader political case that Democratic local governments — and the Democratic attorney general — are out of step with Arizona’s immigration laws. 

In practical terms, the Legislature’s entry into the dispute raises the stakes for everyone. Pima County now faces not just protest and litigation risk, but possible fiscal consequences and a Supreme Court showdown. And after the Pinal County clash, the message from Republican lawmakers is clear: local resistance to ICE is no longer being treated as an isolated county matter, but as a statewide enforcement test case.