Homeland Security Secretary Nielsen resigns amid Trump anger over border

U.S. Homeland Security Secretary Kirstjen Nielsen, who oversaw President Donald Trump’s bitterly contested immigration policies during her tumultuous 16-month tenure, resigned on Sunday amid a surge in the number of migrants at the border with Mexico.

A senior administration official said Trump asked for Nielsen’s resignation and she gave it.

Trump, who has recently expressed growing anger about the situation at the border, said on Twitter: “Secretary of Homeland Security Kirstjen Nielsen will be leaving her position, and I would like to thank her for her service.”

In another tweet, Trump said Kevin McAleenan, the current U.S. Customs and Border Protection commissioner, would become acting DHS secretary.

In a tweet late Sunday, Nielsen said that she would stay on until Wednesday.

“I have agreed to stay on as Secretary through Wednesday, April 10th to assist with an orderly transition and ensure that key DHS missions are not impacted,” she said.

Nielsen’s departure was first reported by CBS News.

Nielsen, 46, had been DHS secretary since December 2017. Her departure had been repeatedly rumored over the past year, particularly after a wave of anger over the administration’s 2018 family separation policy at the border with Mexico and most recently as U.S. border officials estimated that 100,000 migrants were apprehended at the southern border in March, the highest level in a decade.