Mack Dunkin joined the Texas Nationalist Movement in January 2021. He has served as a Content Writer and a Local Coordinator, and now serves as a Senior Field Recruiter for the TNM. Mack's family moved to Texas in 1835 and settled in the DeZavala Colony in what is now southern Angelina County, making him a seventh-generation Texan. Mack serves as a Precinct Chair and a Program Chair in his County GOP and serves as a delegate to the Republican State Convention. He is also a Member of the Line in the Sand Society.

Dunkin has been a minister with the churches of Christ since 1987 and has preached across the southeastern United States and throughout east and south Texas. He is also a professor of psychology, having earned a Bachelor of Science in Psychology - Christian Counseling from Liberty University, a Master of Psychology (MPsy) from LeTourneau University, and he is currently a doctoral candidate at Amridge University in the Doctor of Ministry (DMin) program. He was selected to the All-USA Academic Team and the Texas All-State Academic Team. He is a member of Psi Chi International Honor Society in Psychology, Tau Sigma Honor Society, and Phi Theta Kappa Honor Society. He served two years as the president of the Psychology Club while he was a student, and has served as a Co-Director and Director of the Psychology Club as faculty.

Dunkin has owned a local bookstore, been a co-owner in a small, international re-manfacturing corporation, and owned a product brokerage company.

Born and raised in southeast Texas, Dunkin lives in east Texas. When not studying his Bible and evangelizing, he enjoys being with his wife, children, and grandchildren, and riding his tractor or his motorcycle.