James Warren DeMint, commonly known as Jim DeMint, is an American conservative politician, businessman, and author born on September 2, 1951, in Greenville, South Carolina. Raised by his single mother, Betty DeMint, after his parents' divorce, alongside three siblings, DeMint was instilled with values of hard work and perseverance. He attended Christ Church Episcopal School and graduated from Wade Hampton High School in 1969, where he played drums in a cover band called Salt & Pepper. DeMint earned a Bachelor of Science in communications from the University of Tennessee in 1973, becoming a member of the Sigma Alpha Epsilon fraternity, and later obtained a Master of Business Administration from Clemson University in 1981. He married his high school sweetheart, Debbie Henderson (later Debbie DeMint) in 1977. Before entering politics, DeMint worked in research, advertising, and marketing, founding the DeMint Group, a Greenville-based marketing research and strategic planning firm, in 1983, which he ran until 1998. A devout Presbyterian Christian, DeMint was active in his local church and volunteered with numerous charitable organizations in Greenville.

DeMint's political career began with his election as a Republican to the U.S. House of Representatives for South Carolina's 4th congressional district in 1998, serving three terms from 1999 to 2005, and was elected president of the Republican freshman class. He then won election to the U.S. Senate in 2004, taking office in 2005 and representing South Carolina until his resignation on January 3, 2013, to become president of The Heritage Foundation, a prominent conservative think tank, a position he held until 2017. As a leading figure in the Tea Party movement, DeMint founded the Senate Conservatives Fund in 2008 to support conservative candidates and challenge establishment Republicans, advocating for smaller government, individual liberty, fiscal conservatism, strong national defense, and traditional values. He has been criticized for his hardline stances on social issues, fiscal conservatism, and opposition to government spending, including attacks on fellow Republican Lindsey Graham. DeMint authored several books on conservative principles and biblical interpretations, including 'The President Wears No Clothes' and 'Falling in Love with America Again,' and championed reforms on health care, education, taxes, and entitlements, including efforts to ban congressional earmarks. At Heritage from 2013 to 2017, he expanded its influence, notably partnering with the Federalist Society on Supreme Court nominations that led to Neil Gorsuch's confirmation. DeMint resigned from Heritage in May 2017 at the board's request amid reported tensions over changes to its lobbying arm.

Post-Heritage, DeMint has continued influencing conservative networks as Chairman of the Conservative Partnership Institute, Founding Chairman of the Palmetto Promise Institute—a South Carolina-based policy organization—and founder of the Senate Conservatives Fund. He has served as a senior advisor to Citizens for Self-Governance and remains a vocal commentator on politics, endorsing candidates like Ted Cruz and playing key roles in judicial nominations. DeMint and his wife Debbie have four children. His net worth has been estimated as modest, around $40,501 in 2010 disclosures, reflecting his background as a small business owner. No major legal controversies are documented, though his tenure at Heritage ended controversially.