inb4 Kobach
Nielsen's expected departure is a part of a massive DHS overhaul engineered and directed by top Trump adviser Stephen Miller, according to a senior U.S. official. It's unclear whether Nielsen is deciding to leave voluntarily, or whether she has been pressured to resign. Nielsen has served as DHS secretary since December 2017, and questions about how much longer she might last have swirled for months as the president voiced his mounting frustrations over illegal immigration levels.