Anyone who knows me would tell you that I wouldn't vote for Jeb Bush in a million years. Regardless, I think the controversey surrounding his answer to the question about whether or not he would have authorized the invasion of Iraq is based on a faulty reading of said question and answer. To wit:
Fox News’ Megyn Kelly asked Bush a straightforward, concise question: “Knowing what we know now, would you have authorized the invasion?” Bush’s answer was an unhesitating yes.
“I would have, and so would have Hillary Clinton, just to remind everybody,” Bush said, “and so would have almost everybody that was confronted with the intelligence they got.”
“You don’t think it was a mistake?” asked Kelly.
“In retrospect, the intelligence that everybody saw, that the world saw, not just the United States, was faulty,” Bush answered.
Kelly's question was NOT straightforward nor concise, it was ambiguous.
She didn't ask him what he would have done if he knew then what he knows now. She asked him to say what he would have done "knowing what he knows now" if he were the President then.
There is a subtle difference between that and the question she likely meant to ask, which could have been phrased thus: "If you knew then what you know now, would you have ordered the invasion?" He answered the question she asked, not the question she probably MEANT to ask.
And, by the way, he did concede, without actually saying it, that his brother's choice was based on a misreading of the facts at the time the decision was made.