President-elect Donald Trump has selected South Dakota Gov. Kristi Noem as his next secretary of the Department of Homeland Security, according to two people familiar with the selection.

President-elect Donald Trump has chosen South Dakota Gov. Kristi Noem to lead the Department of Homeland Security.

Ms. Noem, the governor of South Dakota, would play a major role in carrying out the president-elect’s promises to crack down on the border and deport millions of people.