The head of the Department of Homeland Security’s immigration enforcement agency has recognized the right of members of Congress to visit detention facilities —even unannounced.

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.

Newark Mayor Ras Baraka is denying that he trespassed at a new federal immigration detention center during a confrontation that led to his arrest.