Watch: Obama, Biden and Clinton remember 'tenacious' Jesse Jackson

"noted the country's political climate."

— Kamala Harris , Politician

"His voice calls on each of us to be heralds of change, to be messengers of hope."

— Barack Obama , Politician

"Jesse kept hope alive for us in his lifetime, and we've got to continue to do it."

— Joe Biden , Politician

"Jackson made me a better president because he was always pushing on things."

— Bill Clinton , Politician

"I'm not into saying ‘I told you so,’ but we did see it coming."

— Kamala Harris , Politician

"I foresee tomorrow will represent everything that Rev. Jackson stood for."

— Chauncey D. Brown , Activist

"Former President Barack Obama took a swipe at President Donald Trump, without mentioning him by name."

— Barack Obama , Politician

"a man who, when the poor and the dispossessed needed a champion and the country needed healing, stepped forward again and again and again and said: ‘send me’"

— Barack Obama , Politician

"underrated, undeterred and unafraid"

— Joe Biden , Politician

"we won’t go back!"

— Al Sharpton , Activist

"It is with profound sadness that we announce the passing of civil rights leader and founder of the Rainbow PUSH Coalition, the Honorable Reverend Jesse Louis Jackson Sr."

— Jesse Jackson , Activist

"Jackson was a man who, when the poor and the dispossessed needed a champion and the country needed healing, stepped forward again and again."

— Barack Obama , Politician

"He was underrated, undeterred and unafraid."

— Joe Biden , Politician

"We won’t go back!"

— Al Sharpton , Activist

"I knew Jackson well and described him as a good man."

— Donald Trump , Politician

"It is with profound sadness that we announce the passing of civil rights leader and founder of the Rainbow PUSH Coalition."

— Jesse Louis Jackson Sr. , Activist

"The message he sent to a 22-year-old child of a single mother with a funny name, an outsider, was that maybe there wasn't any place or any room where we didn't belong."

— Barack Obama , Politician

"He knew change came from the inside out."

— Bill Clinton , Politician

"It is with profound sadness that we announce the passing of civil rights leader and founder of the Rainbow PUSH Coalition, the Honorable Reverend Jesse Louis Jackson Sr."

— Jesse Jackson , Activist

"He died peacefully on Tuesday morning, surrounded by his family."

— Jesse Jackson , Activist

"Our father was a servant leader — not only to our family, but to the oppressed, the voiceless, and the overlooked around the world."

— Jesse Jackson , Activist