Justice Department probes Walz over immigration enforcement obstruction allegations

The Justice Department’s Minnesota scrutiny has moved on two tracks at once: one focused on possible obstruction tied to immigration enforcement, and another built around sweeping fraud cases that have put Gov. Tim Walz under intense political pressure. The separate immigration probe, first reported in January 2026, involved a grand jury that issued subpoenas for Walz and Minneapolis Mayor Jacob Frey over alleged obstruction of federal law enforcement.

Walz has cast that inquiry as an abuse of power, calling it “dangerous” and “authoritarian” and accusing the Trump administration of weaponizing the justice system. The allegation at the center of the case is not fraud, but whether state or city leaders interfered with federal immigration enforcement efforts. That distinction matters: the evidence question in the obstruction probe is different from the document trails, claims data and billing records that have driven Minnesota’s fraud cases.

Those fraud cases, however, have created the backdrop for the broader clash. Federal prosecutors have described Feeding Our Future as the largest COVID-19 fraud scheme in the United States. The Justice Department said the program grew from about $3.4 million in federal funds in 2019 to nearly $200 million in 2021, and prosecutors said it operated through more than 250 child nutrition sites across Minnesota. In court filings and verdict-related releases, the intended loss was put at about $250 million, with allegations that defendants falsely claimed to have served millions of meals to children.

Minnesota officials have tried to show they are tightening controls. The Minnesota Department of Human Services said it stopped payment to 636 providers since Jan. 1, 2025 as part of anti-fraud efforts. Walz also unveiled a comprehensive anti-fraud package in 2026 that would extend statutes of limitations for certain fraud crimes to seven years, and he called on House Republican leaders to turn over whistleblower tips and evidence to investigators.

The pressure intensified again in May 2026, when the Justice Department announced a separate Minnesota health-care fraud takedown charging 15 defendants in schemes involving more than $90 million in intended loss. The White House said Vice President J.D. Vance chairs the administration’s Task Force to Eliminate Fraud, while the Justice Department said its National Fraud Enforcement Division was expanding Medicaid-fraud enforcement and hiring 15 new trial attorneys.

For Walz, who ended his bid for a third term, the new federal attention is less a single case than a widening legal and political burden. The obstruction probe is still separate from the fraud wave, but together they give Minnesota Republicans and the Trump administration a sustained line of attack as the state’s Democrats try to argue they are cleaning up the damage rather than causing it.