A federal judge this week declined to block the Internal Revenue Service from sharing highly sensitive taxpayer data with Immigration and Customs Enforcement, a victory for President Donald Trump

The IRS can share taxpayer data with federal immigration officials only in cases involving immigrants with final deportation orders or ongoing criminal investigations, according to a newly unsealed agreement between the Treasury and Homeland Security departments.

A federal judge is refusing to block the Internal Revenue Service from sharing immigrants’ tax data with Immigration and Customs Enforcement for the purpose of identifying and deporting people illegally in the U.