But attention at this year’s winter gathering in Washington D.C. that kicked off Wednesday kept turning to dealings with the federal government, immigration enforcement in cities and violent confrontations in Minneapolis. Boston Mayor Michelle Wu talks with Carole Wedge during the 94th Winter Meeting of the U.S. Conference of Mayors on Wednesday. (Kevin Wolf/AP)As the Trump administration comes under pressure to de-escalate the immigration crackdown in the Twin Cities, mayors of both parties sounded the alarms. “Immigration enforcement has existed in the United States for well over a century. ICE as the federal immigration law enforcement agency has operated for 23 years, under both Republican and Democratic administrations,” the statement read.