Sen. John McCain’s family issued a statement Friday saying the senior senator from Arizona and former Vietnam POW has decided to discontinue medical treatment for the aggressive brain cancer he was diagnosed with last summer.

My family is deeply appreciative of all the love and generosity you have shown us during this past year. Thank you for all your continued support and prayers. We could not have made it this far without you – you've given us strength to carry on. pic.twitter.com/KuAQSASoa7

— Meghan McCain (@MeghanMcCain) August 24, 2018

McCain previously survived melanoma.