The news was expected, but it remains a stunner nevertheless.

U.S. Sen. John McCain today announced he is terminating treatment to fight the aggressive brain cancer that has kept him at home for several months. He has fought the good fight, but as he noted in his statement, age (he is 81) and the cancer have taken their toll.

He doesn’t want to fight any longer.

This saddens me terribly. It should sadden all Americans who understand the sacrifice this man has made in the line of duty to the country he loves. He has spent more than 50 years serving his country: as a Naval aviator, a U.S. House member, a U.S. senator and a Republican presidential nominee.

He was shot down in 1967 over Hanoi during the height of the Vietnam War and taken prisoner. He served heroically — despite the claims of one prominent GOP politician.

Did I agree with Sen. McCain’s politics, his policy, his philosophy? No. This blog post, though, pays tribute to his service, his courage, his fortitude, guts, perseverance and dedication to country.

I know it’s no longer plausible to wish this brave warrior a full recovery. Glioblastoma is, in the words of Sen. McCain’s good friend former Vice President Joe Biden, “as bad as it gets.” However, the former VP has spoken often in the past about his friend’s courage in the face of insurmountable odds.

There is a lesson to be learned here. Politicians who cannot summon the courage to do the right thing when the chips are down need to steal a page from John McCain’s book of life’s lessons.

He is, as CNN anchor Wolf Blitzer described him this morning when the news broke, “a great American.”

May he find comfort and strength in the days ahead knowing that the nation is praying for him.