"The U.S. Department of Justice has repealed a Trump-era policy that cut off hundreds of millions of dollars in grants to sanctuary cities. Those cities limit cooperation with federal immigration authorities. In 2017, the Trump administration said some federal funding would be withheld unless cities allowed federal authorities access to detainees to inquire about their immigration status. Many cities and states get what are called Byrne grants to help pay for things like more training for local police officers.

Benjamin Gonzalez O’Brien at San Diego State University said sanctuary communities didn’t adhere to the policy, putting that grant money at risk because they wanted to promote cooperation between local immigrant communities and police to help solve crimes. He thinks this repeal signals a shift away from the feds asking local law enforcement to enforce U.S. immigration laws."

https://www.marketplace.org/2021/04/29/federal-money-withheld-from-sanctuary-cities-back-in-play/