What is a 'sanctuary jurisdiction' and how was the US list of them made?

The U.S. government's list of “sanctuary jurisdictions” that includes hundreds of communities, both red and blue, is confounding critics. They have noticed the list included misspellings, communities with small immigrant populations, and those with strong support for cooperation with federal authorities.

Jessica Vaughan is director of policy studies at the Center for Immigration Studies, which favors anti-sanctuary policies and started publishing a list of sanctuary jurisdictions 10 years ago. The center's list is different from the government's. Vaughan noted that the center discloses its methodology and frequently updates its list.

“That’s one thing that I feel is missing from the (government's) list is some documentation as to why they’re appearing on the list,” she said.

The list is