President Trump “has for months urged his administration to reinstate large-scale separation of migrant families crossing the border,” NBC News reports. “Trump’s outgoing Homeland Security secretary, Kirstjen Nielsen, resisted — setting her at odds with the president… Nielsen told Trump that federal court orders prohibited the Department of Homeland Security from reinstating the policy, and that he would be reversing his own executive order from June that ended family separations.” “A senior administration official said they believe Trump is convinced that family separation has been the most effective policy at deterring large numbers of asylum-seekers.”