A judge in Virginia temporarily blocked the Trump administration from transferring money in or out of the fund until the court could hear arguments in June.
The order came from the Federal District Court for the Eastern District of Virginia, in Alexandria, in a case brought by a group of people who say they have faced partisan attacks by the Trump administration but expect to be excluded from accessing the fund.
The judge said the 2024 law “constitutes an unjustifiable burden on the right to vote,” and that new voters should be able to prove their citizenship with a sworn affidavit.
The ruling allowed the Trump administration to continue to pursue changes that include enlisting the Postal Service in checking voters against a national database.
Ms. Carroll, who prevailed in a civil trial after accusing President Trump of sexual abuse, is the latest target in a Justice Department campaign going after his perceived enemies.
Republican leaders in the state have asked the justices to clear the way for a congressional map that a lower court found discriminated against Black voters.
A group of immigration judges in 2020 challenged work-related restrictions on their public speaking engagements, saying they violated their free speech rights.