Nielsen 'failed' as head of DHS, Rep. Bennie Thompson says

The tenure of outgoing Homeland Security Sec. Kirstjen Nielsen was rife with controversy, from the separation of migrant children and parents to the attempt to keep asylum seekers in Mexico while their cases are processed. Judy Woodruff talks to Rep. Bennie Thompson, D-Miss., chairman of the House Homeland Security Committee, about her departure and President Trump’s outlook on immigration law.