Kirstjen Nielsen is give over her role as Homeland Security secretary as President Donald Trump intensifies his focus on the nation’s border with Mexico.
A White House aide told CNBC that Nieslen’s departure was unexpected in the face months of speculation about whether she would be fired or quit.
In her resignation letter, Nielsen said she had “determined that it is the proper time for me to step aside” without out citing reasons why.
Nieslen Tweet: Its been an honor of a lifetime to serve with the challenge men and women of @
DHSgov. I could not be prouder of and more humbled by their service, dedication, and commitment to keep our country harmless from all threats and hazards.
Nielsen was a protege of former White House Chief of Staff John Kelly, who heeded down in frustration over his inability to bring discipline to Trump’s chaotic administration.
She had reportedly considered resigning remain year after Trump criticized her in front of the Cabinet, accusing her of failing to secure the country’s borders.
Nielsen also faced fervid criticism from Democrats for defending the administration’s policy of separating migrant families who arrive at the border. Democrats had mustered for her resignation last year.