Markwayne Mullin

9 min read

VERIFIEDPRIMARY SOURCES
VERIFIED 2026-03-24
4 primary8 investigative3 secondary
Republican · Senate · OK
POLITICIAN1READY
UPDATED 2026-03-24

markwayne-mullin oklahoma senate republican energy cherokee indigenous armed-services dhs-secretary trump-cabinet plumber stock-trading

related: Jim Inhofe Fossil Fuel Bloc Koch Network Trump AIPAC Lockheed Martin L3 Technologies

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Who He Is

Markwayne Mullin. Republican Senator from Oklahoma (2023-2026), Cherokee Nation citizen, former plumbing company owner, and Trump’s confirmed Secretary of Homeland Security as of March 23, 2026. Mullin served in the House (2013-2023) representing Oklahoma’s 2nd District before winning the special election for Jim Inhofe’s Senate seat. He brands himself as the “blue-collar senator” — a working-class plumber who built a multimillion-dollar business before entering politics.

Mullin took over his father’s plumbing company at age 20 when it was $500,000 in debt with 6 employees, eventually growing Mullin Plumbing into a 150+ employee regional enterprise. He expanded into environmental services, real estate, agriculture, and restaurants. The plumbing company was sold in 2021, with Mullin reportedly moving between $25 million and $50 million into a cash management account on the day of the sale.

He sits on the Armed Services Committee and the Environment and Public Works Committee — both jurisdictions that directly overlap with his personal financial interests and his top donors.

The Central Thesis

Mullin is the energy industry’s blue-collar brand — a senator whose working-class narrative provides populist cover for fossil fuel donor priorities. His structural function: replace Jim Inhofe (the Senate’s most famous climate denier) with a younger, more telegenic version of the same donor-class relationship. The policy continuity is complete; only the packaging changed. Oil and gas has been his top donor industry across his entire congressional career ($1.3 million total), and his voting record on energy policy is indistinguishable from Inhofe’s.

The deeper story is the wealth accumulation. The New York Times documented that Mullin’s assets grew from approximately $2.8-9 million when he first entered Congress to between $29 million and $97 million by 2024. The “plumber who became a senator” narrative obscures a multimillionaire whose personal fortune grew by an order of magnitude during his time in office — while making over 500 stock trades worth $24 million since 2023 alone, including defense stocks while sitting on the Armed Services Committee.

The Core Contradiction

Mullin’s brand is the self-made Cherokee plumber who represents working people. The reality is a multimillionaire senator who violated the STOCK Act by failing to disclose millions in trades, whose businesses received $1.45 million in PPP loans during COVID, whose family sold a restaurant property to the Cherokee Nation for $700,000 above its assessed value, and whose stock portfolio — heavy in defense contractors — outperformed the market by 8% while he sat on the committee overseeing those same contractors.

Contradiction

The “blue-collar plumber” brand masks a senator whose net worth potentially grew from single-digit millions to nearly $100 million during his time in Congress. His STOCK Act violations — being two-and-a-half years late reporting his wife’s stock purchases and one-and-a-half years late disclosing his own municipal security purchases — are not isolated incidents but symptoms of a structural conflict: a lawmaker trading in the same industries he oversees while claiming the trades are managed by an “independent third-party operator.”

Donor Class Map

Oil and Gas ($1.3M career total)

Mullin’s top donor industry across his entire career. Devon Energy, Oklahoma’s largest independent energy company, is his single biggest contributor ($104,950 from employees and PAC combined). His Environment and Public Works Committee seat gives him direct jurisdiction over EPA regulation and fossil fuel infrastructure — the exact regulatory framework his donors need managed.

Pro-Israel Lobby ($245K+)

AIPAC was Mullin’s single largest contributor in his 2022 Senate special election ($89,000). Total pro-Israel contributions have reached approximately $245,000. This funding relationship accelerated during his Senate tenure and reflects the Israel lobby’s standard strategy of building relationships with rising Republican leaders.

Defense Industry

Mullin holds shares in Microsoft, RTX (formerly Raytheon), L3Harris, and VSE Corporation — all major defense contractors — while sitting on the Armed Services Committee. His financial disclosures reveal direct stock ownership in companies that hold billions in federal contracts overseen by his committee.

DateEventAmountSource
2023-ongoing500+ stock trades including defense stocks$24M totalNOTUS
2022AIPAC contributions to Senate campaign$89,000OpenSecrets
2021Mullin Plumbing sold$25-50M (est.)Financial disclosures
2020PPP loans to Mullin businesses$1.45MSBA records
2024Family restaurant sold to Cherokee Nation above assessed value$1.5M ($700K above assessment)Reporting

Money

Mullin’s transition from House to Senate maintained the same donor relationships while expanding their scope. The “plumber” brand obscures a senator who has executed more than 500 stock trades worth $24 million since 2023, violated the STOCK Act’s disclosure requirements, and holds defense contractor stocks while sitting on the Armed Services Committee. Oklahoma’s oil and gas industry doesn’t need to buy influence with Mullin — his economic identity and donor relationships are perfectly aligned with their legislative priorities. But the defense industry relationship is newer and follows the classic Armed Services Committee pattern: oversight jurisdiction creates investment opportunity.

The STOCK Act Violations

NOTUS reported that Mullin twice violated the Stop Trading on Congressional Knowledge (STOCK) Act:

  • Two-and-a-half years late reporting seven stock purchases by his wife
  • One-and-a-half years late disclosing three Oklahoma-connected municipal security purchases

His response — that an “independent, third-party operator firm” manages all investments and he does not “conduct nor inform trades” — is the standard congressional defense. But his portfolio outperformed the market by 8%, and his holdings concentrated in defense contractors whose contracts are overseen by his committee raise the structural conflict question regardless of whether individual trades were self-directed.

The Cherokee Nation Paradox

Mullin is one of the few Indigenous members of the U.S. Senate, and his Cherokee Nation citizenship is central to his biography. But the relationship is more complicated than the branding suggests:

  • In 2012, the Associated Press reported Mullin Plumbing received approximately $370,000 in federal stimulus funds through the Cherokee and Muscogee Nations. Cherokee Nation records indicated the firm was aware of the funding source; Mullin said he was not.
  • In 2024, the Mullin family sold a restaurant property to the Cherokee Nation for $1.5 million — roughly $700,000 above the property’s assessed value.
  • In August 2025, Mullin drafted legislation requiring Cherokee Nation approval for new trust land acquisitions within its reservation boundaries. The United Keetoowah Band of Cherokee Indians accused Mullin of enabling a Cherokee Nation “power grab” that could terminate their federal recognition benefits.

Pattern: Genuine Win + Structural Limit — Mullin’s Indigenous identity gives him credibility on tribal affairs, but his policy positions consistently favor the Cherokee Nation’s institutional interests (which align with his personal financial relationships) over smaller tribal nations’ sovereignty claims.

The DHS Nomination and Confirmation

Trump nominated Mullin to lead the Department of Homeland Security in March 2026. The Senate confirmed him 54-45 on March 23, 2026, with Democrats John Fetterman (PA) and Martin Heinrich (NM) voting in favor. Sen. Rand Paul (R-KY) voted against, questioning whether a man with “anger issues” could lead ICE and Border Patrol. Paul and Mullin had clashed personally — Mullin had called Paul a “freaking snake” and said he could “understand” why Paul’s neighbor assaulted him.

At confirmation hearings, Mullin deflected questions about whether Joe Biden won the 2020 election and declined to rule out placing DHS uniformed officers at polling locations. He signed an ethics agreement pledging to divest from dozens of investments within 90 days of taking office — including Amazon, Alphabet, Microsoft, L3Harris, RTX (Raytheon), and Nvidia, many of which hold large government contracts. The divestment pledge was an implicit acknowledgment that the STOCK Act violations and defense portfolio conflicts would be untenable at Cabinet level.

Mullin inherits a DHS in turmoil, replacing Kristi Noem, who was fired after a $200 million no-bid advertising contract scandal. The department faces a five-week partial government shutdown affecting TSA, ICE, and Border Patrol operations.

Funding Composition (2023-2024 Cycle)

Source TypePercentage
Large individual contributions ($200+)46.03%
PAC contributions29.76%
Candidate self-financing15.57%
Small individual contributions (under $200)5.29%

The 15.57% self-financing rate and low small-dollar percentage undercut the “blue-collar plumber” brand — Mullin’s campaign is funded by his own accumulated wealth and industry PACs, not by small donors from his Oklahoma constituency.

Rhetorical Signature Moves

The Blue-Collar Plumber: Every policy position filtered through the small business owner narrative — regulations hurt plumbers, taxes hurt plumbers, government hurts plumbers. The plumbing company was sold for tens of millions; the brand remains.

The Cherokee Patriot: Indigenous identity deployed selectively — present for biographical credibility, absent when tribal sovereignty conflicts with energy development or Cherokee Nation institutional interests.

The MMA Fighter: Mullin’s amateur mixed martial arts background and gym physique are central to his MAGA-era persona. The threatened physical confrontation with Teamsters president Sean O’Brien during a Senate hearing was brand-building, not a breakdown — it positioned him as the fighting senator in a party that rewards performative aggression.

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