George Poindexter studied law and began practicing in Albemarle County. He moved to the Mississippi Territory, where he established a law practice and became a prominent figure in the Democratic-Republican Party. Poindexter served as Attorney General and a Territorial House representative, and he prosecuted Aaron Burr during the Burr conspiracy. He was elected as a delegate to the U.S. House of Representatives, advocating for Mississippi's statehood and land title standardization. Poindexter later served as a federal judge, military aide, and Mississippi's first congressional representative and governor. He was appointed to the U.S. Senate, where he chaired key committees and briefly served as President pro tempore. After his political career, Poindexter returned to law practice in Kentucky and Mississippi.

George Poindexter's political identity is marked by a blend of regional advocacy and personal controversy. He consistently pushed for federal patronage and land title standardization in Mississippi, revealing a localized focus on economic stability. Poindexter's legislative record shows an unexpected convergence with opposing factions on environmental regulations, revealing a highly calculated approach to protecting regional industrial interests. His personal life, including multiple marriages and a non-consensual relationship with an enslaved woman, adds layers of complexity to his public persona.