Tom Ewing holds a B.S. from Millikin University and a J.D. from John Marshall Law School. He served in the United States Army Reserve and practiced law privately before becoming an Assistant State's Attorney in Livingston County, Illinois. Ewing spent nearly two decades in the Illinois House of Representatives, where he chaired the House Revenue Committee and became an expert on fiscal matters. He then served in the U.S. House of Representatives, where he chaired the Agriculture Subcommittee on Risk Management and Specialty Crops and was a leader in the Congressional Rural Caucus. Post-Congress, Ewing has held various leadership roles in energy and agricultural sectors, including chairing the Biomass Research and Development Technical Advisory Committee and serving as a senior policy advisor.

Tom Ewing's political identity is marked by a distinctive blend of fiscal conservatism and a commitment to agricultural interests, revealing a highly localized approach to policymaking. His legislative record shows an unexpected convergence with opposing factions on environmental regulations, suggesting a calculated strategy to protect regional industrial interests. Ewing's rhetorical style often emphasizes the importance of a balanced budget and smaller government, yet he simultaneously advocates for the development of renewable energy sources, presenting a complex ideological alignment.