I wouldn’t call that a gaffe...I knew what he meant.
Well, he got his history all screwed up, as another FReeper pointed out on this thread. Bork was "Borked" in 1987, so that had absolutely no effect on Roe v. Wade, which was decided in 1973. Actually, Biden was prabably foolish to bring up the issue of approving or disapproving judges on the basis of ideology - without being prompted by the moderator - because that's hardly a 'Rat strong point.
Incidentally, one other gaffe: referring to the vice presidency, Biden said it's covered in Article I of the Constitution, which makes it an executive office. Actually, Article II covers the executive branch, although Article I, which deals with the legislative branch, references the VP in terms of presiding over the Senate and casting the tie-breaking vote there when necessary. (Of course, he got in a gratuitous lick at Dick Cheney, saying that he was "dangerous" in his alleged expanded view of the powers of the vice presidency.)