April 11, 2019: Kirstjen Nielsen officially resigned as the Secretary of the U.S. Department of Homeland Security (DHS) yesterday, Wednesday, April 10, 2019. Nielsen announced her resignation on Sunday, April 7, 2019, after a meeting at the White House with President Trump. Nielsen, 46, has been succeeded by Kevin McAleenan, who was sworn in as the DHS Acting Secretary yesterday, April 10, 2019. Nielsen was confirmed by the U.S. Senate as the DHS Secretary on Dec. 5, 2017. Nielsen was previously a White House Principal Deputy Chief of Staff for former White House Chief of Staff John Kelly, and she was also previously Kelly’s Chief of Staff at DHS when Kelly was the DHS Secretary. Nielsen received her bachelor’s degree from Georgetown University, and she received her law degree from the University of Virginia.