Tim Sandefur, who supported starting the war (and who seems now to support a number of other things that I likewise do not), has replied in this post. Here are some of the highlights; Welch's questions are italicized, while Sandefur's replies are in Roman:

3) Can you imagine a situation in which the government would be justified in waterboarding an American citizen?

Yes. [Update:] I can imagine a lot. Obviously I am opposed to torture, or its simulacrum, in virtually any circumstance. But I cannot categorically rule out the possibility that waterboarding might be justified under some imaginable set of circumstances.

4) Are there American journalists who should be investigated for possible treason? Should Sedition laws be re-introduced?

This is two questions. Yes, there are probably journalists who ought to be investigated for treason. I don’t have anyone in mind, but I don’t categorically deny the possibility. And no, sedition laws should not be revived.

5) Should the CIA be able to legally assassinate people in countries with which the U.S. is not at war?

Yes.

My eyebrows were raised, to say the least. In the same post, he also offered a list of questions for anti-war libertarians. I'd already answered many of them in the interminable pro- versus anti- debates that happen regularly at Positive Liberty, but his questions provoked a spirited discussion all the same, with my reply, Sandefur's objection to it, in which he bristles at the idea that his replies were"unlibertarian," and a recap of the debate so far, in which I question the value of these sorts of questions in the first place: I find the reasons behind them to be much more important than any attempt to score points by answering"yes" or"no" at appropriate moments.

Finally, Sandefur's questions have also brought a set of answers from elsewhere in the blogosphere.