On March 5, 2026, President Donald Trump nominated Oklahoma Senator Markwayne Mullin to serve as the new Secretary of the U.S. Department of Homeland Security (DHS).
This high-profile announcement came shortly after the President publicly distanced himself from a controversial $220 million border-security ad campaign involving the former Secretary Kristi Noem.
Who Is Markwayne Mullin? Early Life And Business Roots
Markwayne Mullin was born in Tulsa, Oklahoma, on July 26, 1977, the youngest of seven children. He was raised on a ranch in Westville, Oklahoma, where his family balanced ranching with operating a local plumbing business.
Growing up in rural Oklahoma, Mullin spent much of his early life working on cattle operations and helping with the family trade. This upbringing later shaped his political identity as a businessman and rancher rather than a career politician.
- Markwayne Mullin Education
Markwayne Mullin graduated from Stilwell High School before pursuing college athletics.
He then attended Missouri Valley College in 1996 on a wrestling scholarship. However, his studies were interrupted when his father, Jim Mullin, became seriously ill while Mullin was still in his early twenties.
As a result, Mullin left college to take over the struggling family business.
Years later, he returned to complete his education and in 2010 earned an Associate Degree in Applied Science from Oklahoma State University Institute of Technology.
His academic background is often highlighted because he is one of the few U.S. senators without a bachelor’s degree, reflecting his unconventional journey from tradesman to national politics.
- Business Career And Entrepreneurial Ventures
Before entering politics, Markwayne Mullin built a career as a businessman and entrepreneur.
After stepping in to run Mullin Plumbing, he and his wife worked to stabilize and expand the company. Over the following decades, they grew the operation into one of the largest residential service providers in eastern Oklahoma.
The Mullin business portfolio eventually expanded to include several companies, such as:
- Mullin Plumbing
- Mullin Environmental
- Mullin Services
- Rowan’s Steakhouse, a restaurant venture in Oklahoma
Mullin also operates a large cattle ranch in eastern Oklahoma, maintaining ties to the agricultural lifestyle that shaped his upbringing.
- Personal Life And Family
Markwayne Mullin is married to Christie Mullin, his longtime partner, and the couple has six children. The family lives on their ranch in Oklahoma, where Mullin often emphasizes faith, family values, and rural community life.
Public interest in the senator’s family increased following a widely reported Markwayne Mullin son accident, when one of his sons was involved in a serious incident but later recovered.
- Markwayne Mullin MMA Achievement
Beyond business and politics, Mullin has also been active in athletics. He holds a 5–0 professional record as an undefeated Mixed Martial Arts (MMA) fighter and has been inducted into the Oklahoma Wrestling Hall of Fame, reflecting his lifelong connection to wrestling.
Mark Mullin’s Historic Political Career
- U.S. House of Representatives (2013–2023)
Markwayne Mullin’s national political career began in 2012, when he was elected to the U.S. House of Representatives for Oklahoma’s 2nd Congressional District. Running as a political outsider, he campaigned with the slogan “A rancher. A businessman. Not a politician!”, emphasizing his background as a business owner rather than a career politician.
He went on to serve five consecutive terms in the House from 2013 to 2023, building a reputation as a strong conservative voice on issues such as fiscal responsibility, energy independence, and reduced federal regulation.
During his time in the House, Mullin served on the House Energy and Commerce Committee, one of Congress’s most influential committees. In that role, he worked on legislation related to healthcare policy, telecommunications, and energy development, often supporting policies aimed at expanding domestic energy production and limiting federal oversight.
- U.S. Senate (2022–Present)
In 2022, Markwayne Mullin successfully ran in a special election for the U.S. Senate, filling the seat vacated by James Inhofe, who resigned before completing his term.
His election made him one of the few lawmakers to move directly from the House to the Senate through a special election in recent years, further elevating his national political profile.
In the Senate, Mullin has served on several key committees, including the Senate Armed Services Committee, the Senate Committee on Indian Affairs, and the Veterans’ Affairs Committee. Through these roles, he has focused on national defense, veterans’ services, tribal policy, and energy security.
- Historic Tribal Representation
Markwayne Mullin’s Native American heritage remains a defining aspect of his political identity. As an enrolled member of the Cherokee Nation, he became the first Tribal citizen to serve in the U.S. Senate in nearly two decades.
His background has often informed his policy work, particularly on matters involving tribal sovereignty, economic development in Native communities, and federal-tribal relations.
- Rising National Profile
Throughout his time in Washington, Markwayne Mullin has become known for his direct communication style and outspoken positions on issues such as labor unions, Senate GOP funding bills, and border security. His high-profile debates and strong conservative stance have helped increase his visibility within the Republican Party and in national political discussions.
Why Mullin Is Replacing Kristi Noem?
The transition at the DHS follows a period of intense scrutiny for the outgoing secretary, Kristi Noem.
The primary catalyst was a $220 million border security advertising campaign that featured Noem prominently, including scenes of her on horseback at Mount Rushmore.
President Trump recently told reporters he “never knew anything about it” and did not sign off on the expenditure.
During congressional hearings, lawmakers from both parties questioned the contract process, noting that the funds were awarded to Republican-connected firms without a standard competitive bidding process.
Additionally, Noem faced backlash for earlier remarks labeling the deaths of two U.S. citizens shot by federal agents as “domestic terrorism”.
In the wake of these controversies, the President turned to Oklahoma Sen. Markwayne Mullin to lead the department.
The Shield of the Americas
The “Shield of the Americas” is a U.S. regional security initiative aimed at strengthening cooperation with countries across the Western Hemisphere to combat drug cartels, illegal migration, and transnational crime while enhancing border and national security.
As the new DHS Secretary, Markwayne Mullin will be responsible for overseeing the nation’s Shield of the Americas.
His tasks will include:
- Managing border security and immigration enforcement.
- Overseeing the federal response to domestic and international threats.
- Directing the various agencies under the DHS umbrella to ensure national safety.
End Note
Markwayne Mullin’s nomination signals a leadership change at the Department of Homeland Security during a politically sensitive moment for border and national security policy.
The Oklahoma senator will move from Capitol Hill to one of the most powerful security roles in the U.S. government, overseeing immigration enforcement, national threat response, and the administration’s “Shield of the Americas” initiative.
As he prepares for his new responsibilities, the nation watches to see how this former fighter will lead the Department of Homeland Security.
