It’s hard to imagine American political life without Senator John McCain. His departure leaves a void of congressional leadership, of national security thought and moral direction that seems nearly impossible to fill. If ever there were a moment when his presence is necessary, this tumultuous time in our country’s politics is it. The country - and the world - are better for his service to them both.

It is also difficult to imagine my own life without John McCain. The years I spent on his staff, and every day I've known him since, has been a personal and professional privilege. I joined his office while in my twenties, not quite knowing the amazing adventure that would unfold over the next half-decade. Legislative victories and defeats, jokes and war stories and history lessons, trips to Iraq and Uzbekistan and the South Pole - all with a certain presidential campaign thrown into the mix - this was the stuff my experience.

It was extraordinary, and I count myself among the very luckiest: those honored to know John McCain.

Like so many, I will miss him dearly. But our sorrow should be leavened by the transformative effects he left on the views and careers of his Senate colleagues, staff and friends. Senator McCain's fingerprints are all over America’s law and policy, our institutions and even the way in which Americans think of ourselves and our role in the world. And in all this, he leaves behind something far, far greater than himself – a legacy which is, by his own reckoning, the best measure of a meaningful life.

-- Richard, Virginia

One thing I know: No matter what your politics, John McCain believed that no human being of whatever race, creed, ethnicity, heritage, or supposed criminal activity should be tortured. He Believed that torture was wrong -- always!. And so do I.

-- Jean, Wisconsin

I met the character of John McCain within the pages of his book, Faith of My Fathers, well-matched with his conduct as a man. It describes the ground of his action and the enduring worth of his cherished commitments. Whatever shortcomings each person exercises in life or fame which endures, it is the reason for it that all makes sense. Their works do follow them. Rest in Peace.

-- Herbert, California

I voted for John McCain because he was a real life Rambo.

-- JOLEEN, Massachusetts

I have long been an admirer of Senator McCain and very much wanted to see him become our president. I'm deeply grateful for his service to our country as a soldier, a statesman and a role model. To the McCain family, I extend my heartfelt sympathy on your great loss...and ours.

-- Anne, Wisconsin

Senator McCain and the Institute's focus on character driven leadership sets it apart from other organizations. My experience with the Next Generation Leader's program provided me with the insights and skills to make an enduring and positive impact in Canada. This foundational year provides emerging leaders with an unprecedented opportunity to refine their own leadership values and the opportunity to develop an action plan to make a positive impact in their field of choice.

-- Michael, Canada

Senator McCain always spoke with clear conscience, and did the right thing for the country. He is the one that makes America great.

-- Patrick, Texas

A great politican and a honest man, A great character is gone- I am very sad. I will miss him.

-- Johannes, Germany

I met John McCain in 1985, when he spoke to my graduating class at Washington HS. I became a supporter and follower of his from that day forward. He was an amazing man with strong values. Arizona and America will not be the same without him.

-- Brent, Arizona

May God Bless The McCain family.

-- Antonio, Delaware

My Deepest Sympathy to the family..He was truly a protector of our Freedom..He is now a Heavenly Angel ..

-- RoseAnn, Pennsylvania

My family is dedicated to keeping Our Country safe & I must thank John for always doing the same. Thank you, Senator, Peace maker, Valor for all you have done to help me be proud to be an American. May God hold you close & finally allow you to rest.

-- Veronica, Michigan

Senator John McCain was a man of integrity and passion. He care about his country and the environment. The fact that he was tortured during the Vietnam war, and was against torturing our enemies today. This showed he was a man of strength. Perhaps, it was not to be for him not to be president; But, he showed through his books and actions in the Senate, that he was a rare and wonderful man with a great wife and family.

-- Kevin, Florida

John McCain was the Executive Officer of VA174 when I was in A-7E RAG training at Cecil Field in the mid 1970s. He personally taught me low-level tactics, and weapons training at MCAS Yuma AZ. What a GREAT instructor, and motivator! And John had one of the most infectious senses of humor of anyone I have ever known. What an inspiration of a man!!

-- Richard, Idaho

Our hearts go to the McCain family and our country for his lost!

-- Maria, Florida

We will keep you in are hearts for the rest of our lives

-- John, Oregon

Navy Aviator McCain was honored by our Uncle Paul Carr. Paul flew during WII and lived his life as Sentor John McCain, a defender of the Constitution of the United States. As a Vietnam Vet and an American I am most proud of his ethics and Caring of his fellow man. John McCain was God’s Gift to us all.

-- John, Texas

I related to Senator McCain because he was different from most in Congress. He put values and beliefs before political affiliations. He was the best within us. I am sad at our loss but rejoice that he will be rewarded and welcomed in heaven.

-- Jane, Tennessee

Senator McCain lived America’s best qualities: patriotism, integrity, compassion and principled advocacy among them. His example lives on for all of us.

-- Fred, California

My family and I first heard about Senator John McCain running for the 2008 Presidential elections. Were were visiting Minneapolis/St. Paul 10 years ago to attend the State Fair and had no idea the Republican National Convention was being held the same time we were there. We have heard Senator McCain speak on television during this convention and noted his admiration for his country and his devotion to his family. Even though we are from Canada, we took note of how Senator McCain spoke eloquently and how humble he was, even after his election loss. To the people of Arizona and to the McCain Family we offer our heartfelt condolences. God Bless you all.

-- Andrew, Canada

While in college at the University of Arizona, I worked on Senator McCain's first bid for the senate. I always admired Senator McCain's service to our country, his honesty and tenacity. May he Rest In Peace.

-- Janet, Wyoming

To the family: I am sorry for your loss. I watched Senator McCain on television as he fought for and stood for his beliefs. God be with the family in their time of bereavement.

-- Jacqueline, Virginia

I was and had been a huge supporter of John McCain! I’m so saddened to hear of his passing! My thoughts and prayer go out to the McCain family! Thank You John McCain for your Service and all that it intails!!!!!This country lost the best of the best !!!!!

-- Lori, Michigan

Dear Mrs. McCain and family: We would like to express our condolences to you, Honorable John McCain’s Family, for your great loss. Words are inadequate at this time of grief, but we would like you to know that we will always cherish the memories of the Senator as a Combat Hero in Vietnam, enduring six years of harsh imprisonment at the so-called “Hanoi Hilton”. The Senator fought alongside us against the invasion of the Communists to ensure Freedom for the South Vietnamese people. As our Greatest Benefactor, The Senator wrote the McCain Amendment, signed into Law in 2002, which restored derivative refugee status to save thousands of South Vietnamese Prisoners of War and their families from the retribution of the Vietnamese Communists. Senator McCain was a "fighter" and a true "patriot" until the very end; his legacy of service and "love of country" were unparalleled. We send our prayers for "peace" and "healing." Respectfully Yours, Tan Nguyen Republic of Vietnam Veteran

-- Tan, Virginia

Heard him speak to our PAC when he was running for Senator: He mentioned that he got through his POW days by having faith in 3 things: his fellow soldiers (they would rescue him if they could); his Country (they would never forget him and they would rescue him if they could); his God (he was always with him) - I am paraphrasing what he said but I admired him greatly from that day forward. A wonderful man!!!

-- Charlotte, California

It was my privilege to serve as Senator McCains Finance Chairman in S.C. for his Presidential Campaign. I did so because of his love for our Country and his determination to lead every American in contributing to our mission to defend and protect this great nation. He showed us how to act and we will always love him for his depth of character and ability.

-- Robert, South Carolina

He gave me a glimpse of what a George Washington and Abraham Lincoln's Courage, Honor and devotion to the truth was like. They would have been proud to have known him as a friend.

-- Garrick, New York

Rest in peace, John McCain, as you have lived a full and extraordinary life. While you and your fellow congress members did not always agree, there is no dispute that you loved this country, supported a strong military, supported secure borders and immigration reform, supported fair trade, supported tax cuts, supported improved care for our veterans, supported world peace efforts and believed America is a truly exceptional country where freedoms and individual achievements are valued and fostered through capitalism and our representative republic system of government. You devoted your entire life to serve this great nation for which we all are grateful. Bless you and may God embrace and guide you in eternity. Carole

-- Carole, Washington

RIP! Thank you for your service to our country.

-- Kent, California

Our thoughts and prayers are with you and the family. Jack and John slept head to head in prison at one time. Jack said John was always a man of honor. Thanks for what you did for the Islanders (1987) when you came out to Guam while we were there serving for the Church of Jesus Christ of Latter-Day-Saints. Best Regards. Love Connie Rollins S

-- Connie, California

Here is what I said to the US Senate Armed Services Committee at my confirmation hearing last November. "Senator McCain and other members of the SASC, it is an honor to be here. It is humbling to be considered for this position and I thank Secretary Mattis and the President for placing their trust and confidence in me. Senator McCain- as a young Air Force officer going through Aerospace Medicine Primary and SERE training in the early 1980’s, one of your fellow POW’s who spoke to our class mentioned your name as an exemplar of courage and integrity and I have always looked up to you." I meant every word. After I read this, Sen. McCain quietly said, "Thank you..."

-- Dean, California

Thank you for your service in the US Navy, Sir. You were a true hero!

-- Cathy, North Carolina

While touring Tiananmen Square in Bejing, China, because of my similar size and white hair, I was mistaken for John McCain! People surrounded me all chanting his name! Put business cards in my hand and shirt pocket! Took photos with me! He was and will always be loved and respected throughout the world! Gods speed John McCain. God bless his family and friends.!

-- Ken, Florida

Senator John McCain was a human being that honored his work to do good for others. When I met him, Senator McCain was modest and sincere man. One of the few true heroes of our country. Best regards to Cindy and the McCain family, Hon. C. WS Kim

-- Charles WS, Illinois

You will be missed Senator McCain, but your legacy will endure forever. Thank you for teaching us what it means to be a man of impeccable honor.

-- Pat, Massachusetts

I only know him from T.V. and the Newspaper, But he was an AMERICAN HERO! R.I.P. MR .MACAIN!!

-- Robert, Florida

I met him and was beyond humbled when he thanked me for my service

-- Terri, Missouri

Mr. McCain is a true hero. When viewing my own life it doesn't even compare to his. He will always be a hero of mine.

-- Shane, Michigan

While I was a POW in several prisons in Hanoi, John McCain was an inspiration for me to make it "one more day." It was a distinct honor to help in his 2008 Presidential Campaign. He would have been a terrific President! GBU JSM

-- Tom, South Carolina

#IncredibleStrength - at a Public Town Hall John stood there and listened to every word without interrupting as a "disgruntled" Veteran read "a prepared speech", many pages long, time consuming, his raised voice and anger self-evident, criticizing John's Senate Record - then calmly, after asking the Veteran if he was finished, John added "if you can do better, run for the Senate".

-- Lance, Arizona

I met John in April 1964 in Pensacola FL where I was taking an orientation tour of Navy aviation. It was a top gun experience! I admired John while I served in the Navy during the Vietnam War and supported him in his congressional and presidential efforts thereafter. He was a man who continued to learn and contribute to his country right to the end. He will be missed. May God bless his family.

-- Charles, South Carolina

What a great man you have been! I will miss you.

-- Stephan, Germany

I campaigned for John McCain in two presidential elections, at his offices in Phoenix,making phone calls and addressing mail. also I worked at a Scottsdale campaign head quarters . I so wanted Him to become president. I will always honor his memory. As a Scottsdale resident of over 37 years ...Rest in Peace JOHN MCCAIN

-- Joyce, Arizona

He was the first, and only politician who spoke for me-- a Vietnam vet. Rest In Peace

-- David, Vermont

Dedicated to America. There is really nothing more one needs to say.

-- Paul, Illinois

Good bye Senator McCain,thank you for your service, you were a real hero.. You'll be gone but never forgotten. Rest in peace

-- Rose, Massachusetts

John McCain, had he been elected President of the United States, would have not only been a very great president, he would have been able to unite the country, in spite of a hostel main stream media. There was something truly unique in John’s ability to bring any group into dialogue which ultimately benefited the whole. I’m very sad we’ve lost a leader irreplaceable in the younger generations.

-- Beth (Dorithy Elizabeth), Hawaii

My deepest sympathies to the McCain family. He was a true gentleman who took his duties as a senator very seriously. I admire his independence and his love of family and country. May he rest in peace

-- Cindy, Minnesota

Senator McCain will be greatly missed. His service to our country was much appreciated. He led with an open, fair mind. He’s a true example for all of us in so many ways. May God bless and comfort your family.

-- Lisa, Oklahoma

Thank you John, we all aspire to be more like you!

-- Rafael, Florida