Civil rights groups have also contended that Trump’s rhetoric about “sanctuary cities” is built on myths, including the belief that such cities block federal immigration agents from conducting enforcement. No city can block such enforcement, which is a federal responsibility. The concept of a sanctuary city is loose, with some cities, for example, issuing no more than proclamations that they welcome immigrants and others adopting official policies that prohibit their police officers from quizzing people about immigration status.
While many municipalities say they work with immigration agents on serious crime investigations, multiple chiefs of police argue that involving city cops in quizzing people on their status destroys trust in officers, harms crime-fighting efforts and increases the possibility of discrimination and rights violations. Federal officials and cities and states have long fought over expenses for prolonged holding of suspected undocumented immigrants on “detainer” requests. Some groups, representing residents who’ve been held, argue agents should get warrants for those they’re seeking.
Some cities, like San Francisco, have sparked outcry by declining to hold onto jailed people who don’t have recent violent crime records or for whom federal officials don’t file a warrant. A woman was killed in 2015 by such an undocumented immigrant who was charged with second-degree murder. In his defense, the man said he picked up a gun he said he had found, and it discharged, accidently. San Francisco officials said if federal agents had provided a warrant the man would have been held.
Trump’s plans to build wall could cost as much as $20 billion, according to some experts. Taxpayers would have to foot the bill to get the initiative started, while also paying out for a proposed surge in border agents. Trump said his administration is working on a plan to force Mexico to reimburse the costs of the wall, but Mexican leaders have said repeatedly that they won’t pay for it. Since the early 1990s, the border has been gradually fortified in many stretches, with high fences, some multiple, and tall metal barriers. Construction has continued to fill in some areas that officials deem are priorities.
Homeland Security has also supplemented fencing with sensory devices implanted in the ground, as well as an array of cameras and Border Patrol agents. Remote stretches of river, extremely rough terrain and harsh desert divide the two countries and make constructing and maintaining barriers challenging. As urban areas in California and Texas were fortified in the 1990s, many migrants headed into harsh desert terrain in Arizona, where thousands have perished. Although some fencing—with gates—runs through their Arizona reservation, tribal leaders of the Tohono O’odham Nation west of Tucson say they’ll refuse to allow a solid wall to be built through the 75 miles they control. Landowners and those concerned about environmental damage will also have a say over construction as Trump’s plan moves forward.
