Immigrant activists want Philly teachers trained on dealing with ICE

The Trump administration can withhold millions of dollars in law enforcement grants to force states to cooperate with U.S. immigration enforcement

Unofficial cooperation has granted immigration authorities access to databases and, in some cases, people are tipping them off when a person of interest is being released.

The Trump administration is asking the Supreme Court to allow it to largely implement a policy of withholding public safety grants from "sanctuary cities."