Trump Fires Kristi Noem as Homeland Security Secretary

The Kristi Noem firing has become the first major cabinet shake-up of President Donald Trump’s second term after the U.S. leader removed her as Secretary of Homeland Security following mounting criticism of her leadership. Trump announced on March 5, 2026, that Noem would be replaced by Republican Senator Markwayne Mullin of Oklahoma, pending Senate confirmation.

The decision came after weeks of political pressure related to the Department of Homeland Security’s handling of immigration enforcement operations and broader management issues within the agency. Noem, a former governor of South Dakota who took the position in 2025, had been a prominent figure in implementing the administration’s hardline immigration agenda.

Trump revealed the change in a social media statement, thanking Noem for her service while simultaneously naming Mullin as his nominee to lead the department. The president said Noem would move into a new role as Special Envoy for the “Shield of the Americas,” a proposed security initiative focused on strengthening cooperation across the Western Hemisphere.

The Kristi Noem firing followed intense scrutiny during congressional oversight hearings earlier in the week. Lawmakers from both major parties questioned her about controversial immigration raids and the handling of two fatal shootings involving federal immigration agents in Minneapolis. The incidents sparked nationwide debate after the victims were identified as U.S. citizens and Noem initially described them as engaged in acts of domestic terrorism, claims that critics argued were not supported by available video evidence.

Additional criticism centered on spending decisions within the Department of Homeland Security. Lawmakers raised concerns over a costly national advertising campaign encouraging migrants in the United States without legal status to voluntarily leave the country. Questions also emerged about the department’s disaster response and the pace at which emergency aid was distributed through the Federal Emergency Management Agency.

Despite the controversies, Trump praised Noem’s work on border enforcement, saying she had achieved “spectacular results” in implementing the administration’s immigration policies. Her departure nevertheless marks a significant shift within the administration, particularly given the central role the Department of Homeland Security plays in the president’s broader immigration strategy.

Mullin, who Trump described as a strong ally and supporter of the administration’s security policies, would take over leadership of the department once confirmed by the Senate. Under federal law governing vacancies in executive agencies, Mullin may serve in an acting capacity while the confirmation process proceeds.

Noem’s removal also carries broader political significance as the first cabinet-level departure during Trump’s second term. The leadership change highlights the pressure facing officials responsible for overseeing controversial immigration operations and managing large federal agencies during a period of intense political scrutiny.

Following the announcement, Noem thanked the president for the new appointment and highlighted what she described as “historic accomplishments” during her tenure at Homeland Security. The newly created envoy position is expected to focus on regional security cooperation in the Americas, though full details of the initiative have yet to be announced by the administration.