The third-largest school system in the United States is drawing a line in the sand against the Trump administration's crackdown on undocumented immigrants:  Chicago Public School (CPS) principals are ordered not to cooperate with Immigration and Customs Enforcement (ICE) agents unless they come with a court warrant.

Nearly half of CPS's 381,000 students are Latino, and there is concern that immigration authorities could racially profile parents outside the schools and their children inside.  Realistically, some of those children are likely undocumented.  To protect them from Trump, CPS Chief Education Officer Janice Jackson wrote a memo telling principals to keep immigration agents outside, avoid sharing any student records, and come up with plans to help children while their parents are detained.

"To be very clear, CPS does not provide assistance to U.S. Immigration and Customs Enforcement in the enforcement of federal civil immigration law," Ms. Jackson wrote.

Across the country, school systems are preparing for the possibility of ICE raids.  In New York City, principals there have been told that immigration officers many not be granted access without legal authority.  In Syracuse, NY, the school board approved a policy requiring schools to deny access to ICE officials until they consult with the superintendent.  Salt Lake City, Utah is discussing a similar policy.

On a larger scale, Washington state Governor Jay Inslee signed an executive order reaffirming policies that bar state police and corrections officers from making arrests purely on immigration status - a clear rebuke of the Trump administration, which said it would count on state and local law enforcers to bolster its efforts to round up and deport undocumented people.

"Washington has always been and will always remain a place that welcomes and embraces people of all faiths, all nationalities and all orientations," said the governor.  "This executive order makes clear that Washington will not be a willing participant in promoting or carrying out mean-spirited policies that break up families and compromise our national security and community safety."

Connecticut's governor, New York City's Mayor, the police chief of Los Angeles and other officials from around America have announced similar - albeit less confrontational - policies.