A private detention center in New Jersey has again become a major flashpoint in the fight over the Trump administration's immigration policies. Why it matters: It's the first major clash under Homeland Security Secretary Markwayne Mullin's leadership. Protesters have been arrested outside the facility while detainees reportedly take part in a hunger strike over claims of inhumane living conditions and inadequate medical care. The 1,000-bed Delaney Hall Facility reopened in Newark, New Jersey,