More than a million New Yorkers carry a municipal ID, issued by the city. The ID NYC program was launched in January 2015 to help undocumented immigrants and others unable to obtain other forms of government identification. City officials point to the program as an important aspect of New York’s sanctuary policies for immigrants without legal papers.  But the strident anti-immigrant policies of the Trump administration are creating new challenges for the municipal ID. Rosalind Tordesillas has the story.