George M. Dallas was educated at Quaker-run schools and graduated from Princeton University. He began his career in public service as a private secretary to Albert Gallatin, participating in diplomatic missions during the War of 1812. Dallas held various legal and financial roles, including serving as counsel to the Second Bank of the United States and as Deputy Attorney General of Philadelphia. He transitioned into politics, serving as United States Attorney, U.S. Senator, and Attorney General of Pennsylvania. His diplomatic experience includes serving as envoy to Russia and minister to Great Britain. Dallas's professional background encompasses a blend of legal, financial, and diplomatic expertise.

George M. Dallas's political identity is marked by a dynamic ideological stance, particularly in his evolving views on tariffs and slavery. Initially favoring protectionist tariffs, he later became an advocate for tariff reduction, showcasing an ideologically agile approach. His support for popular sovereignty on slavery weakened his political base, revealing a calculated risk in aligning with less popular stances. Dallas's rhetorical style is characterized by a blend of regional advocacy and unexpected policy convergences, such as supporting annexation while simultaneously advocating for tariff reduction.