https://www.americanthinker.com/blog/2020/02/the_trump_administration_is_finally_going_after_sanctuary_cities.html
One of the most galling things that the left has done is to block Immigration and Customs Enforcement by creating so-called sanctuaries to protect known criminal illegal aliens from arrest. The phrase “sanctuary city” (or sometimes “sanctuary state”) is something of a misnomer, of course, because while these places are sanctuaries for criminals who are being released back into the community, they’re anything but sanctuaries for the communities ravaged by those same immigrants.
Early on, the Trump administration tried to withhold federal funds from California as a way to block it from declaring itself a sanctuary. The problem was that California rushed into federal court where a friendly activist judge immediately issued a nationwide injunction. It wasn’t until July 2019 that the Ninth Circuit reversed that decision, and then only on narrow grounds.
Suddenly, though, after three years, the Trump administration is moving aggressively against the sanctuary city/state problem. It began last week when the administration announced that it was prohibiting New York state residents from participating in programs such as Global Entry and NEXUS which allow low-risk travelers to enter the U.S. more easily.