It's a meaningless poll. Obviously we aren't going to nuke anybody unless there's a very good reason to. So, what is the reason? I wouldn't have any idea how to answer such a dumb question.
Same with the torture question. What do they mean by torture? What is at stake? What kind of prisoner do we have here, and what crimes has he committed? Nobody likes the word "torture," but there are ways of questioning people that are not permanently damaging that might well be justified in given circumstances.