John McCain faced numerous personal adversities throughout his life, most notably during his military service in the Vietnam War. As a POW for over five years, he endured severe torture and isolation, which instilled in him a profound sense of resilience and commitment to public service. Despite his experiences, McCain maintained a spirit of optimism and dedication to his country. He also battled cancer later in life, confronting this challenge with the same strength he exhibited throughout his career as a U.S. Senator and presidential candidate, embodying the values of perseverance and courage.