The mayors of these cities risk losing all federal funding from the Trump administration by choosing to fight his hard-line positions on immigration.
A number of mayors from the country’s largest cities have rejected President-elect Donald Trump’s position on illegal immigration, saying they will remain "sanctuary cities"
One of those is Chicago Mayor-- and former White House Chief of Staff -- Rahm Emmanuel.
"To all those who are, after Tuesday's election, very nervous and filled with anxiety ... you are safe in Chicago, you are secure in Chicago and you are supported in Chicago," he said at news conference Monday alongside immigration activists, business leaders and lawmakers.
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"Chicago has in the past been a sanctuary city. ... It always will be a sanctuary city," he added.
His comments come after Trump’s controversial interview with 60 Minutes, in which he promised to deport all immigrants with criminal records -- up to three million of them.
Sanctuary cities are areas that have policies of not cooperating with federal immigration authorities. Trump’s "First 100 Days" plan supposedly includes cutting off federal funding to sanctuary cities.
Those areas include New York, Los Angeles, San Francisco, Seattle, and Philadelphia. About 300 cities and counties across the country have such a policy.