For a Presidential candidate to think that having been correct, about the Iraq war, validates his judgement, in other matters, may be a sign of poor judgement, in itself.
I was against the war, in Viet Nam , even when the Viet Minh was fighting the return of the French, after the end of WW II, to no avail when it came to making poor choices in other matters.
When the drumbeat for war against Iraq began, a couplet, that I had heard, kept echoing in my head: "This be the greatest treason, to do the right deed for the wrong reason". I, too, was adamantly against the Iraq war, but I think that Hillary has, in a way, been getting a bum rap, all these years. I think that had I been a Senator, on October 2, 2002, when the Senate passed the use of force, in Iraq, resolution, I would have voted the same way. At that moment, U.N. inspectors were prevented, by Iraq, from doing their job, and not to have voted for it, to force Saddam's hand, might have been imprudent, indeed. The U.N. inspectors returned to Iraq in November, 2002.
As far as I am concerned, Hillary misjudged only the depth of the perfidy of the last Republican president who, himself, ordered the U.N inspectors out of Iraq on March 17, 2003, and began hostilities a scant 3 days later.