Trump fires Noem, names Mullin DHS secretary β but the law may block it
Mullin can''t legally serve as acting DHS secretary while awaiting Senate confirmation
Mullin can''t legally serve as acting DHS secretary while awaiting Senate confirmation
Kristi Noem became the first cabinet secretary fired in Trump's second term on March 5, 2026. Trump announced her removal and named her replacement in a single Truth Social post, with no advance warning to Noem or her staff.
Noem had been one of Trump's most loyal public allies since 2020. Her firing showed he'll cut loose even close allies when they become a political liability. CBS News
Essential concepts and terms to understand this topic
The law that controls who can legally serve as an acting officer when a Senate-confirmed position is vacant.
President picks officials for executive branch and judicial positions
Empty positions in government when officials resign, die, or are removed
The president's senior advisory body, composed of the vice president and heads of 15 executive departments, each requiring Senate confirmation.
Senate process for approving presidential appointments to high offices.
Former Secretary of Homeland Security (fired March 5, 2026)
Noem ran DHS for 14 months before her firing. Her Senate testimony on the $220 million no-bid PR contract β and her acknowledgment that Trump approved it β made her politically untenable. She also oversaw the Minneapolis ICE operation that killed two U.S. citizens, drawing bipartisan condemnation.
U.S. Senator (R-OK), nominated to be DHS Secretary
Trump's chosen replacement for Noem. Mullin must resign his Senate seat and win Senate confirmation before he can legally lead DHS. Until confirmed, he can't serve even in an acting capacity under the FVRA.

President of the United States
Trump fired Noem and named Mullin on the same day, setting a March 31 effective date. His decision to fire Noem β one of his most loyal allies β illustrated that he treats cabinet members as expendable when their public testimony creates political liability for him personally.
Deputy Secretary of Homeland Security
Under the FVRA, Huffman is the lawful acting DHS secretary if Mullin isn't confirmed by March 31. His name has barely appeared in public coverage of the transition, but he would hold authority over the third-largest federal department during the gap.

Governor of Oklahoma (R)
Stitt must appoint a Republican to fill Mullin's Senate seat once Mullin resigns. His choice will serve through November 2026 and could affect close Senate votes during the transition period.

Legal scholar, Cato Institute
Berry publicly identified the FVRA barrier to Mullin serving as acting DHS secretary, noting there are 'a couple of reasons' the appointment would be legally defective before Senate confirmation.
True
Kristi Noem was the first cabinet secretary fired in Trump's second term.
Multiple outlets confirmed Noem was the first cabinet-level departure caused by a firing (as opposed to a resignation) since Trump began his second term in January 2025.
True
DHS signed a $220 million no-bid contract with a PR firm to promote Trump's immigration agenda.
Noem confirmed the contract's existence and amount in Senate testimony and said Trump personally approved the spending.
False
Markwayne Mullin can legally serve as DHS acting secretary before Senate confirmation.
The FVRA bars sitting senators from serving as acting officers for Senate-confirmed positions. Mullin must be confirmed before he can legally exercise the secretary's authority.
False
Gov. Kevin Stitt must appoint a Democrat or hold a special election to fill Mullin's seat.
Oklahoma law requires Stitt to appoint a registered Republican. Because Mullin's term expires in November 2026, no special election is required.
Contact your senator about the Mullin confirmation hearing
civic action
Mullin's confirmation hearing will be the Senate's first real opportunity to put DHS under oath since Noem's firing. Your senator can push for specific questions about the $220 million ad contract, the Minneapolis ICE shootings, and how Mullin plans to run the agency differently.
Read the Federal Vacancies Reform Act analysis
research
The FVRA is one of the most important β and least understood β laws governing executive power. Understanding it tells you what the president can and can't do when cabinet seats open up, and what courts can do when the rules are broken.