I have a little quibble with that headline. Something more like "Obama Administration confident that it can get away with killing US citizens..." [for reasons]. Just because they declare themselves exempt from clear laws does not mean they are. The Constitution still trumps a legal memo. I mean, I still have hope that somehow Obama and Bush and others will be brought to justice, even though I realize it's unlikely.
Tree can fall in unpopulated woods without making sound, declares person outside woods. No. There's still a sound.
... I don't mean to imply that Xeni is carrying water for Obama. But it's an important distinction. They can "declare" all they want, just like John Yoo and Jay Bybee and others have. We don't have to accept or repeat them as if they're true.