WASHINGTON, DC - JUNE 18: U.S. Secretary of Homeland Security Kirstjen Nielsen speaks on migrant children being separated from parents at the southern border during a White House daily news briefing at the James Brady Press Briefing Room of the White House June 18, 2018 in Washington, DC. Nielsen joined White House Press Secretary Sarah Sanders at the daily news briefing to answer questions from members of the White House Press Corps. (Photo by Alex Wong/Getty Images)