Economy John McCain, ex-POW and 'maverick Republican', dies at 81 Updated : August 26, 2018 04:34 PM IST A senator for Arizona for more than three decades, McCain had been suffering from glioblastoma, a brain cancer, since July 2017 and had not been at the US Capitol this year. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.