David Hazzard spent several years in military service, including roles in the Delaware militia during the War of 1812, where he defended Lewes, Delaware. He transitioned into public service, holding positions such as justice of the peace and serving in the Delaware Senate. Hazzard pursued a career in governance, eventually being elected governor as a member of Henry Clay's National Republican Party, where he supported significant state constitutional changes. He later served on the Delaware Superior Court, demonstrating a commitment to both military and judicial branches. Hazzard's career reflects a blend of military, legislative, and judicial experience, punctuated by advocacy for state infrastructure and constitutional reforms.

David Hazzard's political identity is marked by a curious blend of progressive economic initiatives and conservative social policies. He championed state-funded education and infrastructure projects, yet simultaneously supported measures to restrict freedoms of free African-Americans, revealing a complex calculus in his approach to governance. Hazzard's legislative record shows an unexpected convergence with opposing factions on environmental regulations, revealing a highly calculated approach to protecting regional industrial interests.