The Trump administration scored another victory in its push to end sanctuary city policies that protect illegal immigrants. On Monday, Louisville, Kentucky’s Democratic Mayor Craig Greenberg informed the Department of Justice that the city will revise its stricter immigration detainer policy after facing federal threats of a lawsuit.

In a letter obtained by Fox News Digital, Mayor Greenberg said the change was partly to avoid Louisville being labeled a “sanctuary” city—typically defined as jurisdictions that resist cooperating with federal immigration enforcement. He explained that returning to pre-2017 practices and honoring 48-hour detainers would mean Louisville would no longer be considered a sanctuary jurisdiction, avoiding the negative consequences linked to that label.

The policy reversal follows a DOJ warning last month that Louisville’s detainer policy obstructed immigration enforcement efforts. The department reminded the mayor that jurisdictions refusing to comply with detainer requests have faced lawsuits and federal funding cuts.

Detainer policies are critical in determining sanctuary status. ICE issues detainer requests to local jails, asking them to hold suspected illegal immigrants for up to 48 hours so ICE can take custody. Sanctuary cities often ignore these requests.

In Louisville, the Metro Department of Corrections had been releasing individuals before the 48-hour window expired, preventing ICE arrests. Attorney General Pam Bondi confirmed the change Tuesday on X, saying Louisville was “dropping its sanctuary city policies,” though she provided no further details.