Former President Donald Trump’s plan to deport as many as 20 million migrants from the U.S. would likely involve “large operations” in so-called sanctuary cities that don’t cooperate with federal immigration officials, according to a report Sunday. Two former Immigration and Customs Enforcement officials appointed by Trump told the New York Post that ICE has “systems in place that are very good at identifying people” and that immigration officers would probably be temporarily relocated to round them up. “This effort will likely include citywide operations where officers from different parts of…