Kirstjen Nielsen, whose background in cybersecurity sparked praise when she was named Department of Homeland (DHS) Secretary, reassigned Sunday.

"This afternoon I submitted my resignation to @POTUS and thanked him for the opportunity to serve in his administration. It's been an honor of a lifetime to serve with the brave men and women of @DHSgov," Nielsen tweeted, noting their dedication to protecting the U,S. from threats.

Last fall, it was widely rumored that Trump would soon give Nielsen the boot.
Once the top aide to White House Chief of Staff John Kelly when he headed DHS, Nielsen followed him to the White House, becoming his principal deputy chief of staff and helping him tighten up the West Wing. Her expertise included homeland security policy and strategy as well as cybersecurity, critical infrastructure and emergency management.

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