One of the House Democrats from New Jersey under investigation by Kristi Noem’s Department of Homeland Security slammed the government’s arrest of Newark’s mayor as “un-American.” House Rep. Bonnie Watson Coleman told CNN’s State of the Union that Immigration and Customs Enforcement’s arrest of Mayor Ras Baraka is what led tensions to explode as she and two other House Democrats attempted to tour an ICE detention facility.

An immigration detention center in New Jersey is at the center of tensions between three congressional Democrats and the Trump administration after the arrest of Newark’s mayor outside the facility.