Sen. John McCain of Arizona passed away at his home in Arizona on Saturday evening, putting an end to a nearly six-decade-long career in public service.
The 81-year-old senator ultimately succumbed to a battle with a highly malignant form of brain cancer, known as glioblastoma. Fewer than 5 percent of patients live beyond five years of the diagnosis, with a median survival rate of only 18 months. The same form of cancer claimed the lives of former Sen. Ted Kennedy of Massachusetts and Beau Biden, the late son of former Vice President Joe Biden.
McCain started treatment shortly after his diagnosis in July 2017, splitting his time between Walter Reed National Military Medical Center in Maryland and the Mayo Clinic in Arizona. Despite undergoing aggressive rounds of chemotherapy and radiation, the senator managed to fulfill his day-to-day obligations in the Senate until December, providing a loud and prominent voice during both the health care and tax reform debates in 2017.