The city acknowledged that the change could make it more difficult for some families to visit detained loved ones.

State law, in fact, specifically prohibits local law enforcement from working with federal immigration enforcement operations in most instances.

The Trump administration’s increasingly aggressive moves on immigration are pulling Democrats back into a border security debate they had tried to ignore. For months, Democrats scarred by the politics of the issue sought to sidestep President Donald Trump’s immigration wars — focusing instead on the economy,

The situation has all the elements that the president seeks: a showdown with a top political rival in a deep blue state over an issue core to his agenda.