U.S. Immigration and Customs Enforcement can delegate immigration enforcement duties to state and local police under a law enacted in 1996 and known as 287(g), after a section of the Immigration and Nationality Act.

During the first months of President Donald Trump’s second term, through April 15 2025, the number of participants in the program more than doubled, a Markup analysis found. The Markup found use of the program was especially prevalent in Florida, where all residents live in a county where local police will be trained under the program. This database and visuals below are automatically updated with data from ICE.