The Justice Department is threatening legal action against four Democratic-led states for denying undercover license plates to Immigration and Customs Enforcement agents, escalating a constitutional dispute over immigration enforcement authority. DOJ Civil Division Assistant Attorney General Brett Shumate sent letters on May 12 to the governors of Maine, Massachusetts, Washington and Oregon, warning that their refusal to provide confidential registration plates to federal immigration officers violates the Supremacy Clause of the Constitution.
At issue is whether these states are merely declining to assist ICE with civil immigration enforcement or actively obstructing federal law by withholding license plates that conceal agents' identities. The dispute centers on a narrow but consequential question: can state administrative decisions about vehicle registrations constitute illegal interference with federal immigration authority?
What the Left Is Saying
Democratic-leaning states argue they are protecting civil liberties and maintaining appropriate limits on federal power. A Massachusetts governor's office official told Fox News Digital that the commonwealth does issue undercover plates to federal agents but only when investigating criminal offenses, noting that immigration enforcement typically involves civil infractions rather than crimes.
"Massachusetts is not going to allow state resources to be used to help ICE operate in secret while they are violating people's rights and making us all less safe," a governor's office spokesman said. "Any federal, state or local agency engaging in legitimate criminal law enforcement work can receive a confidential plate. We all know that's not what ICE is doing."
The official added that fears of doxing ICE officers are unfounded because non-confidential plates only disclose that the agency owns the vehicle, not individual agent identities. Massachusetts argues it applies identical restrictions to state and local agencies investigating civil matters.
What the Right Is Saying
Conservative legal experts and Trump administration allies say states cannot pick and choose which federal laws to facilitate. Charles "Cully" Stimson, a senior legal fellow at the Heritage Foundation, said the states are playing a "dangerous game" by refusing to cooperate with ICE operations.
"Every one of these states is part of the union," Stimson told Fox News Digital. "It is assumed that when the federal government is enforcing federal law, the states are going to play ball." He noted that constitutional principles imply mutual cooperation between federal and state governments in enforcing their respective laws.
ICE claimed in January 2026 that agents and their families have experienced an 8,000% increase in death threats. DOJ's Shumate characterized the states' policies as a matter of "life and death" in his May 12 letters to the governors.
What the Numbers Show
Four states are facing potential DOJ legal action: Maine, Massachusetts, Washington and Oregon. All four have Democratic governors and have enacted various sanctuary policies limiting state cooperation with federal immigration enforcement.
DOJ's legal argument hinges on alleged Supremacy Clause violations. Shumate wrote to Oregon Gov. Tina Kotek that "Oregon's DMV has directly run afoul of the Supremacy Clause by discriminating against the federal government" while continuing to issue undercover plates without restriction to similarly-situated state and local agencies.
Stimson, however, questioned whether DOJ's legal theory is as strong as presented. "Federal law preempts state law when state law conflicts with a supreme federal law," he said. "There is no law in my mind that is conflicting with federal law. You simply have state actors refusing to issue these types of license plates." He added: "So as much as I think the DOJ is putting forth a plausible argument, I don't think there's a lot of 'there' there in this argument."
The Bottom Line
This dispute represents the latest flashpoint in ongoing tensions between Democratic-led states and the Trump administration over immigration enforcement. If DOJ follows through with litigation, courts would need to determine whether state decisions about administrative services like vehicle registration can constitute unconstitutional interference with federal authority.
Oregon and Maine appear to have issued broader suspensions of undercover plate issuance to all federal agencies, while Massachusetts distinguishes between criminal and civil enforcement work. The legal outcome could establish precedent for how far states can go in limiting cooperation with federal immigration authorities without running afoul of the Constitution's supremacy provisions.