William Henry Bissell graduated from the Philadelphia Medical College and practiced medicine in Illinois. He transitioned to a political career, serving in the Illinois House of Representatives and as prosecuting attorney of St. Clair County. Bissell held congressional positions and chaired the Committee on Military Affairs. During the Mexican War, he served as colonel of the Second Regiment, Illinois Volunteer Infantry. He was elected governor of Illinois, where he faced notable policy challenges and controversies. Bissell's professional background includes a mix of medical practice, legislative service, and military leadership.

William Henry Bissell's political identity is marked by a blend of ideological rigidity and strategic pragmatism, particularly evident in his handling of the Macalister-Stebbins bonds. His anti-slavery convictions were fervent, yet he navigated complex economic decisions with a calculated approach, swiftly adjusting his stance when faced with public backlash. Bissell's military background and Catholic faith further add layers to his political persona, revealing a candidate who balances deeply held beliefs with a nuanced understanding of regional interests.