I mentioned Nathaniel Parker's article, Weigh Anchor! Enforce the Citizenship Clause.[VDARE.com, August 31, 2001] below. It's no longer the only source online of this kind of information—Fred Elbel has set up an entire website at www.14thamendment.us. It has links to a number of articles, including ours of course, which explain the constitutional question.
You can see a speech on the subject given by lawyer William Chip below: