President Donald Trump Fires Homeland Security Secretary Kristi Noem, Appoints Sen. Markwayne Mullin

President Donald Trump abruptly dismissed Homeland Security Secretary Kristi Noem on March 5.

“Based on facts observed and verified directly by our journalists or by informed sources”

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He announced the change in a one-line post on his Truth Social platform and said he would nominate Oklahoma Republican Sen. Markwayne Mullin to replace her.

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President Donald Trump said the change would take effect March 31, 2026.

Multiple outlets report Noem was named to a new diplomatic role tied to a hemisphere security initiative called the "Shield of the Americas."

The announcements came as Noem was appearing and speaking at a Major Cities Conference in Nashville.

Noem’s tenure at DHS was described across outlets as turbulent and controversial: she was a prominent architect of an aggressive deportation program and drew sustained criticism over a $220 million advertising campaign and her early characterization of two people killed in Minneapolis during ICE operations.

Lawmakers of both parties had sharply questioned her in congressional hearings, and some Republicans had even called for her resignation.

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Sen. Markwayne Mullin was identified by the administration as the nominee to replace Noem.

“El presidente de Estados Unidos, Donald Trump, ha anunciado a través de Truth la destitución de Kristi Noem, responsable de Seguridad Nacional y cara política de la crisis del ICE”

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Reports highlighted his Oklahoma seat and background while noting procedural steps ahead.

Outlets said Mullin will need Senate confirmation but could serve as acting head under federal vacancy law while his nomination is pending.

His expected departure from the House, or shift in roles, has immediate political consequences in Oklahoma.

Observers and lawmakers framed the personnel change as politically consequential and reflective of broader tensions over immigration enforcement.

Coverage emphasized that Noem’s firing came amid intense scrutiny—hearings, protests, lawsuits and questions about spending and operations—and raised questions about the future direction of ICE and DHS enforcement under Mullin.

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The move was described as one of the largest staffing shakeups of the administration’s second term and surprised members of both parties.

Trump said Noem will be named Special Envoy for the Shield of the Americas.

“AI-supervised summary Donald Trump has decided to dismiss Kristi Noem as U”

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Trump said the initiative will be unveiled in Doral.

Le Monde

Noem publicly thanked Trump and continued to speak at DHS events following the announcement.

Reporting notes Mullin’s nomination was posted on Truth Social.

Reporting notes Mullin’s confirmation process, the gubernatorial ripple in Oklahoma, and lingering investigations and reviews tied to Minneapolis operations and ad spending all remain unresolved.