A U.S. judge found ​that the Trump administration unlawfully demanded information from several Minnesota officials at the height of its immigration crackdown in the state ‌earlier this year, ruling that the Justice Department had abused the investigative process.

The ruling by Minnesota-based U.S. District Judge Patrick Schiltz quashed subpoenas to the office of the state’s Democratic Governor Tim Walz and five other local and state offices, according to an order made public on Monday.

It effectively halts a probe by President Donald Trump’s Justice Department into whether ​Democratic officials had impeded immigration enforcement in their public resistance to the deployment of thousands of agents to conduct deportation roundups.