Giuliani, in his extremely brief statement about the SC decision, implies that the Partial Birth Abortion ban is constitutional - and that's why he agrees with the decision. He does not say that he agrees with the ban itself. He doesn't say why he disagrees with the ban, and it isn't because it is unconstitutional, but because he actually supports partial birth abortion along with every other form of abortion on demand. He has said that he supports partial birth abortion as recently as 2000 as my last post points out in detail.
If he's slightly altered the wording of his support for abortion, it is simply because his focus-grouped, carefully packaged by political consultant, campaignspeak he's using to fool Republicans into voting for him demands it. He hasn't changed his position on anything - and he said he never would - he's just changed the way he markets his odius liberal views.
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Agreed. Giuliani wants to be president. To achieve that goal, he is willing to do what it takes.