A federal judge on Monday blocked a Trump administration voter-screening database, ruling that the government’s “haphazard” system unlawfully consolidated “the private information of millions of Americans” in an effort to purge non-citizens from voter rolls.

In her order, U.S. District Judge Sparkle Sooknanan said the federal government “has knowingly trampled on the privacy rights of American citizens in a manner that threatens the sacred right to vote.”