A federal judge on Thursday said President Donald Trump’s former personal lawyer Alina Habba is not legally serving as the acting US attorney for New Jersey, laying the groundwork for a potential review of the Trump administration’s method for installing some top prosecutors around the country.

A U.S. judge on Thursday ruled that Alina Habba, a former personal lawyer to President Donald Trump, was unlawfully appointed as the acting U.S. Attorney for New Jersey and is therefore ineligible to participate in any ongoing cases.

U.S. District Judge Matthew Brann held that Habba’s term as the interim U.S. attorney ended in July, and the Trump administration’s “novel series of legal and personnel moves” to keep her in the role without getting confirmation from the U.S. Senate didn’t follow procedures required by federal law.