Mack Dunkin joined the Texas Nationalist Movement in January 2021. He serves as a Content Writer and a Local Coordinator for the TNM. His family moved to Texas in 1835, settling in the DeZavala Colony in what is now southern Angelina County.

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 at his local college and alma mater. He holds two Associate of Arts degrees in Psychology and Interdisciplinary Studies - Honors from Angelina College and Liberty University, respectively; a Bachelor of Science in Psychology - Christian Counseling (Summa Cum Laude); a Master of Psychology (MPsy) from LeTourneau University, and is currently a doctoral student (DMIN) with Amridge University. He was selected to the All-USA Academic Team and the Texas All-State Academic Team. He is also a member of Psi Chi International Honor Society in Psychology, Tau Sigma Honor Society, and Phi Theta Kappa Honor Society.

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

Born and raised in southeast Texas, Dunkin lives in east Texas with his wife Kim, who is an RN (critical care, hospice, and mental health). They have four children and seven grandchildren.