Jeb Bush the voter plans to sit out the presidential race in November.
The ex-presidential candidate wrote on Facebook Friday that he won't vote for presumptive Republican nominee Donald Trump -- Bush's chief GOP campaign foe -- or likely Democratic nominee Hillary Clinton.
"The American Presidency is an office that goes beyond just politics. It requires of its occupant great fortitude and humility and the temperament and strong character to deal with the unexpected challenges that will inevitably impact our nation in the next four years," Bush wrote. "Donald Trump has not demonstrated that temperament or strength of character. He has not displayed a respect for the Constitution. And, he is not a consistent conservative. These are all reasons why I cannot support his candidacy."
Reporters had pressed Bush's spokeswoman for the former Florida governor's position since Trump became the de facto nominee earlier this week, when his last remaining rivals, Ted Cruz and John Kasich, dropped out of the race.
On Facebook, Bush congratulated Trump and said he will "support principled conservatives at the state and federal levels, just as I have done my entire life."