Baker told the Times that "It was as gentle a passing as I think you could ever expect anyone to have. And he was ready."
In a statement issued after Bush’s death, Baker called him a person who "led with strength, integrity, compassion and humility" and whose legacy "will be forever etched in the history of America and the world. It is a lifelong record of selfless patriotic service to our nation."
"His passion was a deep love of family and our country," Baker said. "It was my pleasure and great joy to have had him as my special friend for more than 60 years."
Jeb Bush tweeted Saturday that "I already miss the greatest human being that I will ever know. Love you Dad!"
His son, Jeb Bush Jr., said nothing gave his grandfather more joy than service to others. "His leadership taught us to be kinder and gentler, to love each other," Jeb Bush Jr. said. "We will miss him dearly."
Bush will lie in state at the Capitol Rotunda in Washington beginning on Monday, and the public will be able to pay their respects through Wednesday morning, it was announced by Congressional leaders.