WASHINGTON — In the first major Cabinet upheaval of his second term, President Donald Trump announced Thursday that Homeland Security Secretary Kristi Noem will vacate her post at the end of the month. Trump has tapped Republican Sen. Markwayne Mullin of Oklahoma to lead the department as it grapples with bipartisan outrage over a series of fatal enforcement actions and a controversial multimillion-dollar advertising campaign.
The reshuffle, announced via Truth Social on March 5, 2026, effectively fires Noem following a disastrous 48 hours of testimony on Capitol Hill. While Trump publicly praised Noem for “spectacular results” on the border, he simultaneously shifted her to a newly created role as Special Envoy for The Shield of the Americas, a security initiative set for a formal rollout this Saturday in Doral, Florida.
A “Political Nightmare”: The Fall of Kristi Noem
Noem’s tenure at the Department of Homeland Security (DHS) reached a breaking point this week during heated oversight hearings before the House and Senate Judiciary Committees. The former South Dakota governor faced blistering critiques from both sides of the aisle, particularly concerning Operation Metro Surge, a federal immigration crackdown in Minnesota.
The investigation into Noem’s leadership centered on two high-profile fatalities:
- Renée Good: A 37-year-old U.S. citizen fatally shot by an ICE officer in Minneapolis on January 7.
- Alex Pretti: A 37-year-old VA nurse and U.S. citizen shot by Border Patrol agents on January 24 while filming an enforcement action.
Noem’s insistence that both victims were engaged in “domestic terrorism” was debunked by bystander video and forensic evidence, fueling accusations of a “culture of impunity” within the department. Sen. Thom Tillis (R-NC), a rare Republican critic of the Secretary, characterized her leadership as a “disaster,” while Sen. John Kennedy (R-LA) grilled her on the ethics of a $220 million taxpayer-funded ad campaign.
“The ad campaign was primarily ‘effective in your name recognition,'” Kennedy told Noem on Tuesday, referring to a series of television spots featuring Noem on horseback.
A ProPublica investigation previously revealed that the contract for those ads was awarded to a firm with deep personal ties to Noem and her senior aides, bypassing standard competitive bidding processes.
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Trump Disavows “Self-Deportation” Ads
The final blow to Noem’s standing appeared to be her claim during testimony that President Trump had personally authorized the $220 million “self-deportation” campaign.
Trump flatly denied the assertion on Thursday morning, telling Reuters, “I never knew anything about it.” The public contradiction signaled a total collapse of confidence between the West Wing and the DHS chief, leading to the afternoon announcement of her replacement.
Enter Markwayne Mullin: A “Confrontational” Successor
In selecting Sen. Markwayne Mullin, Trump is turning to a staunch loyalist known for his aggressive rhetoric and unconventional background. Mullin, a member of the Cherokee Nation, would become the first Native American to serve as Secretary of Homeland Security if confirmed.
Mullin’s Profile at a Glance:
- Legislative Record: Served 10 years in the House before joining the Senate in 2023.
- Reputation: A former MMA fighter known for a “confrontational” style on Capitol Hill.
- Experience: Lacks traditional homeland security or law enforcement background; historically focused on family business and tribal issues.
“Markwayne will make a spectacular Secretary of Homeland Security,” Trump wrote, citing Mullin’s 13 years of service in Congress. Mullin is expected to prioritize a “level-headed” approach to the border while maintaining the administration’s hardline stance on illegal immigration.
Looking Ahead
Noem will officially transition to her envoy role on March 31, 2026. Mullin’s confirmation process is expected to be a lightning rod for debate over the administration’s “Shield of the Americas” policy and the ongoing legal fallout from the Minneapolis shootings.
