Unfortunately glioblastoma is an aggressive brain tumor with a very low chance of survival.

When he was a POW in Vietnam, his Navy admiral father was able to get him released early. He refused because he didn’t want preferential treatment over his fellow POWs. Amid booing from his supporters after Senator Barack Obama was declared the 44th President in 2008, McCain expressed his admiration for Obama and wished him a successful presidency.

Say what you will about the man, but he’s a true American hero. Honorable, tough as nails.

Godspeed, John McCain. This Democrat will miss you.

John McCain is an American hero & one of the bravest fighters I’ve ever known. Cancer doesn’t know what it’s up against. Give it hell, John.

— Barack Obama (@BarackObama) July 20, 2017