Harry Kelly earned a law degree from Notre Dame Law School and served as state's attorney for LaSalle County, Illinois, before transitioning to public service in Michigan. During World War I, he served in the U.S. Army, where he was wounded and lost his right leg, subsequently earning the Croix de Guerre with palm leaves. Kelly held various roles in Michigan, including assistant prosecuting attorney for Wayne County and Michigan Secretary of State. He was elected Governor of Michigan, where he advocated for state government reorganization and convened a grand jury to examine legislative misappropriations. Kelly later served on the Michigan Supreme Court.

Harry Kelly's political identity is marked by a blend of principled advocacy and strategic pragmatism. His tenure as governor saw him tackle state government reorganization and scrutinize legislative misappropriations, showcasing a commitment to transparency and efficiency. Kelly's judicial appointments to the University of Michigan Regents reflect a nuanced approach to education policy, balancing institutional governance with progressive ideals. Despite his military valor, Kelly's legislative actions reveal a calculated effort to protect regional industrial interests, hinting at an unexpected convergence with opposing factions on environmental regulations.