...There's always the option of being honest, whichever way that sits with the voters...
Even if that comes at the expense of your brother? Unlikely. Unnecessary.
...He was a strong supporter of the war and his brother's handling of it. Now he must answer for it. If it was the right judgement, he should be able to defend it...
He was the governor of a State at the time and had (insofar as I am aware) zero input into the affair.
If that perception holds up under a closer scrutiny, then,, there is no need for him to answer for it.
A great many people supported the Iraq War during its early-to-middle going, including a great many Democrats, so, Jeb need not be held to a higher standard.
...Any chance of that happening?...
Options...
1. answer critics of his old Iraq War support, and dredge-up old shit that might reflect badly upon a beloved brother
2. remain silent on the subject because it was not his War and he is not responsible for the actions of his brother
My guess is, that he'll choose (2). I would. So would you, I'll wager.
...He certainly must answer questions about PNAC, and it's thinly-veiled wish for another Pearl Harbor in order to change public opinion about Neo-Conservative adventurism, militarily, overseas.
He must answer no such thing.
He can merely state that he believed in the principles by which that think-tank was founded and operated during its lifetime.
And, although it seems clear that various members and those influenced by that particular think-tank did, indeed, capitalize upon 9-11 (another 'Pearl Harbor') in order to get our defenses in-order and to let our military stretch its legs overseas again in a big way, there is no credible indication that such members and those influenced by it actually wished for such a catastrophe - merely that the think-tank's principles predicted that another 'Pearl Harbor' would be a catalyst for an otherwise long and dragged-out retooling and expansion of the armed forces.
Personally, I don't see Jeb as being obliged to defend the 'Pearl Harbor' catalyzing observation, given its basis in logic and subsequent factual developments.
But that's just me, and, perhaps, I'm missing something fundamental conjuring-up my own snapshot reaction.