President Donald Trump’s renewed immigration crackdown has opened a new front in the national fight over how much local governments must do to help enforce federal policy. In counties across the country, elected sheriffs are now positioned at the center of that dispute because they run local jails, control day-to-day law enforcement cooperation, and in many places answer directly to voters rather than to governors or mayors.
Sheriffs are central to the latest enforcement push
A coalition led by San Francisco and Santa Clara County sued the Trump administration on February 7, 2025, challenging an executive order that threatened to cut federal funds from jurisdictions that limit cooperation with federal immigration enforcement, according to Reuters. That lawsuit put county governments and the sheriffs who operate county jails squarely in the middle of the administration’s effort to expand arrests and deportations.
Sheriffs matter because county lockups are often where Immigration and Customs Enforcement seeks access to people already in local custody. ICE’s 287(g) program allows state and local agencies to perform limited federal immigration functions under ICE supervision, and DHS said on September 17, 2025, that the program had grown to more than 1,000 agreements with agencies in 40 states. ICE says the program can include jail enforcement and task-force style partnerships.
The scale of the issue became clearer again in late May 2025, when DHS published a list identifying 14 states, 298 counties and 200 cities as sanctuary jurisdictions, according to Stateline. DHS later removed the list after objections from the National Sheriffs’ Association, whose president, Idaho Sheriff Kieran Donahue, said the designations lacked transparency and a clear way to challenge them.
What county residents should know is that the practical effect of Trump’s immigration push can differ sharply from one sheriff’s office to another. In Colorado, for example, Reuters reported in March 2025 that sheriffs were split over how closely to work with ICE, with some declining to take part in immigration operations while others favored deeper cooperation within the limits of state law.
That patchwork matters because sheriffs often decide how jail notifications, transfers, detention requests and officer participation are handled on the ground. In states with laws that restrict local help for federal civil immigration enforcement, sheriffs may have less room to cooperate. In states that encourage or require collaboration, local residents may see closer operational ties between county jails and federal agents.
What remains unclear in many states is how many individual sheriff’s offices will expand agreements, reduce them, or keep current practices in place. Federal officials have promoted broader cooperation, but many counties have not publicly released detailed local plans, and there is no single nationwide roster showing how each sheriff intends to respond beyond formal ICE partnership announcements.
The reason sheriffs have become so important is that the Trump administration is testing how far Washington can push local officials to assist federal immigration enforcement. Reuters reported that cities and counties challenging the administration argued the federal government was unlawfully trying to force cooperation through funding threats and possible prosecution. That dispute echoes earlier constitutional fights over whether the federal government can effectively commandeer local authorities.
At the same time, the administration has worked to make cooperation more attractive to local law enforcement. Reuters reported in early 2025 that federal officials were urging sheriffs to provide more jail space and to join 287(g), while DHS and ICE continued presenting the program as a force multiplier for immigration enforcement. The National Sheriffs’ Association generally supports immigration enforcement, but its public criticism of the sanctuary-jurisdiction list showed that even sheriffs aligned with federal priorities may resist when they say the process is inaccurate or unilateral.
For residents, that means the next phase of any challenge to Trump’s immigration agenda may play out as much in county courthouses and jail policies as in Washington. Court rulings will shape the legal boundaries, but the daily reality in many communities will depend on whether local sheriffs decide to cooperate fully, limit involvement, or wait for clearer direction from judges and state law.