As President Donald Trump’s administration targets states and local governments for not cooperating with federal immigration authorities, lawmakers in some Democratic-led states are intensifying their resistance by strengthening state laws restricting such cooperation.

In California alone, more than a dozen pro-immigrant bills passed either the Assembly or Senate this week, including one prohibiting schools from allowing federal immigration officials into nonpublic areas without a judicial warrant.

Other state measures have sought to protect immigrants in housing, employment and police encounters, even as Trump’s administration has ramped up arrests as part of his plan for mass deportations.

In Connecticut, legislation pending before Democratic Gov. Ned Lamont would expand a law that already limits when law enforcement officers can cooperate with federal requests to detain immigrants. Among other things, it would let “any aggrieved person” sue municipalities for alleged violations of the state’s Trust Act.

Two days after lawmakers gave final approval to the measure, the U.S. Department of Homeland Security included Connecticut on a list of hundreds of “sanctuary jurisdictions” obstructing the enforcement of federal immigration laws. The list later was removed from the department’s website after criticism that it errantly included some local governments that support Trump’s immigration policies.

Since taking office in January, Trump has enlisted hundreds of state and local law enforcement agencies to help identify immigrants in the U.S. illegally and detain them for potential deportation. U.S. Immigration and Customs Enforcement now lists 640 such cooperative agreements, a nearly fivefold increase under Trump.

Trump also has lifted longtime rules restricting immigration enforcement near schools, churches and hospitals, and ordered federal prosecutors to investigate state or local officials believed to be interfering with his crackdown on illegal immigration. The Department of Justice sued Colorado, Illinois and New York, as well as several cities in those states and New Jersey, alleging their policies violate the U.S. Constitution or federal immigration laws.

Just three weeks after Colorado was sued, Democratic Gov. Jared Polis signed a wide-ranging law expanding the state’s protections for immigrants. Among other things, it bars jails from delaying the release of inmates for immigration enforcement and allows penalties of up to $50,000 for public schools, colleges, libraries, child care centers and health care facilities that collect information about people’s immigration status, with some exceptions.

Polis rejected the administration’s description of Colorado as a “sanctuary state,” asserting that law officers remain “deeply committed” to working with federal authorities on criminal investigations.

“But to be clear, state and local law enforcement cannot be commandeered to enforce federal civil immigration laws,” Polis said in a bill-signing statement.

Illinois also has continued to press pro-immigrant legislation. A bill recently given final approval says no child can be denied a free public education because of immigration status — something already guaranteed nationwide under a 1982 U.S. Supreme Court decision. Supporters say the state legislation provides a backstop in case court precedent is overturned.

The bill also requires schools to develop policies on handling requests from federal immigration officials and allows lawsuits for alleged violations of the measure.

Democratic-led states are pursuing a wide range of means to protect immigrants. A new Oregon law bars landlords from inquiring about the immigration status of tenants or applicants. New laws in Washington declare it unprofessional conduct for bail bond agents to enforce civil immigration warrants, prohibit employers from using immigration status to threaten workers and let employees use paid sick leave to attend immigration proceedings for themselves or family members.