McCain died on Saturday afternoon, one day after his family announced he would be discontinuing his brain cancer treatment.
"Senator John Sidney McCain III died at 4:28pm on August 25, 2018," a statement from McCain's office said. "With the Senator when he passed were his wife Cindy and their family. At his death, he had served the United States of America faithfully for sixty years."
World reacts to news of Sen. John McCain's death
World reacts to news of Sen. John McCain's death
My deepest sympathies and respect go out to the family of Senator John McCain. Our hearts and prayers are with you!
I love you forever - my beloved father @SenJohnMcCain https://t.co/Y50tVQvlVe
My heart is broken. I am so lucky to have lived the adventure of loving this incredible man for 38 years. He passed… https://t.co/nWEaWOoDB1
Our statement on the passing of Senator John McCain: https://t.co/3GBjNYxoj5
As you go through life, you meet few truly great people. John McCain was one of them. His dedication to his country… https://t.co/fX5PcJe7Ot
A giant. An icon. An American hero. God bless @SenJohnMcCain. He will never be forgotten.
My full statement on the… https://t.co/Mh5GZ09O7W
Condolences and prayers to the McCain Family.
Gratitude and respect for John McCain, who served the nation honora… https://t.co/PaB92wvQZR
I have ordered all flags be lowered to half-staff in honor and remembrance of the incredible life of @SenJohnMcCain… https://t.co/8C8iNPkVYP
He was a patriotic, courageous hero who served his country above all. You will be missed, Senator McCain. May you Rest In Peace.
My statement on the passing of Senator John McCain. https://t.co/ZuM18FUo31
Today we lost an American original. Sen. John McCain was a maverick and a fighter, never afraid to stand for his b… https://t.co/o2fqEk9oXp
John McCain was my friend. I will remember the good times. My family and I send prayers for Cindy and the McCain fa… https://t.co/fAJiNNZpWW
John McCain was a giant of our time—not just for the things he achieved, but for who he was and what he fought for… https://t.co/l5shnJTvTw
President George W. Bush reacts to death of John McCain https://t.co/evqDZqIfnZ
John McCain’s sacrifices to his country are immeasurable. With his passing today, America has lost more than a lead… https://t.co/bEqPlHHbbj
Senator John McCain was a true friend of Australia who was committed to strengthening the alliance between our two… https://t.co/HedHivpm94
Rest In Peace John McCain a true maverick and real life American hero. An extraordinary role model who lifted othe… https://t.co/2E2QrzSBBr
I was honored to have met John McCain. He always stood up for what he believed was right. Sending love to his famil… https://t.co/LdcyKw0PPV
.@SenSchumer will introduce a resolution to rename the Russell Senate Office Building after Sen. John McCain: https://t.co/oY1XIbcL8U
John McCain was an American hero, a man of decency and honor and a friend of mine. He will be missed not just in th… https://t.co/rKQLDtvTeP
Senator John McCain was a patriot, and an extraordinary American war hero. Heidi and I send our heartfelt thoughts… https://t.co/aGlwhVJKIE
MCCONNELL Stmt on the passing of @SenJohnMcCain: “Today is a deeply sad day for the Senate and for our nation.” https://t.co/mNOIngpm0G
God Bless the memory and legacy of Sen. John McCain. Though we often disagreed, I always found him a gentleman and a patriot. RIP, Senator.
Words cannot express the sorrow I feel at John McCain’s passing. The world has lost a hero and a statesman. Cindy a… https://t.co/CoJO81rcnp
A man who served his country up until his last days...a true patriot and American hero. RIP, John Sidney McCain II… https://t.co/h19B2EhEyz
America and Freedom have lost one of her greatest champions.
….And I’ve lost one of my dearest friends and mentor.
Tonight we say goodbye to a true hero. A man who never sought accolades. A patriot who fought everyday for American… https://t.co/EidT1BomVZ
Senator John McCain was an American patriot and hero whose sacrifices for his country, and lifetime of public servi… https://t.co/qiXtL3qPmN
Statement from team president Michael Bidwill on the passing of Senator John McCain. https://t.co/Zh72H58fNw
Senator John McCain passed today, all i can think about..he never stopped trying to do his best. What an honor it’s… https://t.co/29ZZJPjKRt
John McCain’s courageous and selfless lifetime of service is a profile in American exceptionalism. Prayers this eve… https://t.co/JnbRKn7oF0
Sen McCain was a courageous warrior who served and suffered for the freedom we all enjoy. I lost the GOP nominatio… https://t.co/MEIF3oHjzX
I have not know anyone with greater courage, stronger convictions or more devotion to country than John McCain. He… https://t.co/fdOj1Mrj2C
John McCain believed that every citizen has a responsibility to make something of the freedoms given by our Constit… https://t.co/oI2cBhNH7v
STATEMENT BY FORMER U.S. PRESIDENT JIMMY CARTER ON THE PASSING OF SENATOR JOHN MCCAIN https://t.co/dcuUIJp8tK
I count it as a blessing to have had the honor to serve with John McCain in the Senate and on the Armed Services Co… https://t.co/AIaqi4MxhX
America lost a real hero today. Condolences to @cindymccain, the McCain family and the Arizonans who were so fortu… https://t.co/Ckg2LpdpPx
Rest in peace #JohnMcCain, a hero, a patriot, a selfless man, who served others before serving himself. Our country will miss you.
Duty. Honor. Country. Our nation thanks you, John McCain. There has been no finer son of America... Hanx
This says it all. What an elegant man. May all of our leaders emulate the kind of grace Sen. John McCain exuded.… https://t.co/zbSiBgouqd
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Trump has been criticized for his feud with McCain, which started after he underplayed the senator's renowned military service during the 2016 presidential campaign. McCain, who served in the Vietnam War, spent six years as a prisoner of war.
"He is a war hero because he was captured," Trump said in 2015. "I like people that weren't captured, OK? I hate to tell you."