John Adair served in the American Revolutionary War, rising to the rank of lieutenant. Post-war, he held local judicial positions and migrated to Kentucky, where he became involved in state politics. Adair participated in the Northwest Indian War and held various political offices in Kentucky, including serving as Speaker of the House and in the U.S. Senate. During the War of 1812, he rejoined the militia and later became adjutant general of Kentucky. Adair was elected governor of Kentucky in 1820, focusing on debt relief measures. Later in life, he served in the U.S. House of Representatives.

John Adair's political identity is marked by a calculated approach to regional interests, particularly in military and economic policies. His advocacy for state militias and debt relief measures reveals an unexpected alignment with opposing factions, suggesting a highly localized strategy. Adair's involvement in the Burr Conspiracy and subsequent vindication adds complexity to his political integrity, while his dispute with Andrew Jackson over militia conduct at New Orleans highlights his unwavering defense of Kentucky's honor.