If there is a legal challenge, Obama will reply. If not. you should pardon me, but he should not respond beyond what he has done. It is one thing to cooperate, it's another to make yourself a target and to cooperate in the process. I haven't seen any evidence that anything he might do would stem your hostility toward the man, nor the hostility of those who seem to enjoy bringing these sorts of charges. This sort of thing is what he will have to face throughout his administration, and it will skip about from one set of accusations to another, predictably. Right wing rage will not abate.
The smartest thing that Obama can do is hire a terrific team of lawyers, and have them deliver the absolute minimum satisfaction to any of these attempts at character assassination as it it possible to give. I don't mean he should engage in Schadenfreude at the discomfort of those who try to attack him, merely that he treat it as part of doing Presidential business.
About policy, he should be absolutely transparent. Heaven knows he'll have trouble enough with that, what with folks on both the left and the right having legitimate bones to pick with his policy and procedure decisions. He has a history of infuriating the left as well as the right going back to his days running the Law Review at Harvard, and with his request for the California Minister who helped Proposition 8 repeal gay marriage out here to give an invocation (at his swearing in? at some other important event?) he's already managed to upset some of his gay/lesbian/bisexual/transgendered allies.
Republican lite, in some ways, but I think a decent enough guy, even if you don't.
As for the New Zealand quotes, I find the photo-copies poorly reproduced on the internet to be slightly unconvincing in and of themselves. Beyond that, I've seem mistakes made in high school newspapers and in The New York Times about details like that, and so have you. Also, Obama ran as a democrat in that election, in case it slipped your notice, and to imagine that he was a secret member of another Party at the same time leads us right back into the Communist witch-hunting that darn near destroyed the Republican party for fifteen years in presidential Politics and much longer in Congressional politics. If you really want to go there, fine. I think it hurts the Republicans far worse than it does Obama, though, because it sounds very much like Joe McCarthy looking for secret fellow travelers.
I'm a Democrat myself, and much of The New Party platform as I saw it quoted seemed pretty sensible to me. As does Bernie Sanders, for that matter. Obama's interests seem much further to the right to me. Nowhere near your neck of the woods, mind you, or Mike's, but actually closer to the center of things.
Good luck, though, Denise. And I was happy to hear you'd had some time with the grandkids, and that you'd had the energy to keep up with them at least cameo appearance style.
All my best, Bob Kaven