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 set off a scrum outside the complex.

The mayor of Newark, New Jersey, a Democrat who is running for governor, was arrested on Friday at a privately run federal immigration detention center while three U.S. lawmakers were on site for an unannounced inspection,

Newark Mayor Ras Baraka was arrested at a new U.S. Immigration and Customs Enforcement facility in his city on Friday, escalating tensions between local officials and federal authorities.