Homeland Security boss to leave Trump Administration

President Donald Trump says he's accepted the resignation of Homeland Security Secretary Kirstjen Nielsen.

The President noted that U.S. Customs and Border Protection Commissioner Kevin McAleenan will become acting secretary in her place.

A veteran of the George W. Bush administration, Nielsen had been chief of staff to then-Homeland Security secretary John Kelly before he became Trump's chief of staff at the White House.

U.S. Secretary of Homeland Security Kirstjen Nielsen speaks beside Honduras' President Juan Orlando Hernandez (not pictured) during a multilateral meeting at the Honduran Ministry of Security in Tegucigalpa, Honduras, March 27, 2019.

CBS News reported that Nielsen's departure is part of a "massive overhaul" of DHS "engineered and directed" by Stephen Miller, a top Trump adviser and immigration hardliner. She had expected to be pushed out last November, but her exit never materialized.

The news follows an emergency conference call with members of President Donald Trump's Cabinet last Tuesday evening to discuss migration at the southern border. And during the government shutdown over Trump's insistence for funding for a border wall, Nielsen's stock inside the White House even appeared to rise.

Nielsen became the public face of the policy, and at one point, was targeted by protesters who heckled from a few feet away while she dined at a Mexican restaurant in Washington, D.C. She was tasked with helping states secure elections following Russian interference during the 2016 election. She has lead a sprawling department responsible for carrying out some of Mr Trump's most contentious policies, such as his plan to build a wall on the border with Mexico and the separation of migrant children from their families. She also moved to abandon longstanding regulations that dictate how long children are allowed to be held in immigration detention, and requested bed space from the USA military for some 12,000 people in an effort to detain all families who cross the border.