U.S. Homeland Security Secretary Nielsen leaving her position

U.S. Homeland Security Secretary Kirstjen Nielsen is leaving her position, President Donald Trump said in a tweet on Sunday, as the administration pursues an overhaul of the department responsible for immigration policy. In another tweet, Trump said Kevin McAleenan, the current U.S. Customs and Border Protection commissioner, would become acting DHS secretary. Nielsen, 46, has held the position since December 2017.