You're the only person I know that thinks Holder answered that question the first time around.
I'm pretty sure that I've expressly and repeatedly said that Holder should have clarified the issue sooner than he did. Not sure where you're getting that I think Holder answered any question the first time around.
All I'm saying is that they already had the answer they were wanting Holder to give from the DoJ. Once Holder gave an answer that was nearly identical to what the DoJ had said in regard to enemy combatants, Rand was appeased and has since not made any arguments or statements about the government overstepping its bounds.
If the DoJ has already answered the question being asked, and if Rand has no problem with that answer, then what else was the filibuster except a political ploy to make the public think that the government was doing something shady? If Rand has no problem with Holder's explanation of when drones can be used, and this explanation was already present in the DoJ memo, then why was he suggesting that the government could kill U.S. citizens for absurd reasons, such as when Jane Fonda visited North Vietnam?
Nothing within the DoJ memo (again, to my understanding) suggested that such a scenario would be possible under the DoJ's reasoning, but it was a perfect chance for fear mongering simply because Holder made the public relations mistake of using only the phrase "extraordinary circumstances," and not by explaining that an American citizen would have to be deemed an enemy combatant. Unless Rand didn't read the DoJ memo and failed to read about it in the news, he knew better than to make some of the ludicrous claims that he did.
He still hasn't.
Holder used the term "noncombatant." The DoJ also referred to "enemy combatants." Although Holder didn't cite to them, those have legal definitions. I'm not overly familiar with the case law relating to those definitions, but SCOTUS has written opinions out there which address the topic.
Again, maybe Holder should have elaborated a bit on those terms, but the answer is out there. Rand didn't want to look for it, however, as he wanted to put on a show and make the administration look bad when, in actuality, they appear to be abiding by the law as far as who can be considered an enemy combatant and whether due process applies.