"Gravel has no interest in building support for one of his signature proposals, he thinks his policies shouldn't matter in our decision whether to support him or not, and he has no interest in arguing that he could get that legislation through Congress -- in other words, an effective president. So why the hell is he wasting our time on those debate stages? At least Kucinich pretends his agenda matters. Gravel won't even give us that courtesy."
While my first thought is that everyone is an important part of the debate, it is also true that it is pointless to bring up an idea and then dismiss it immediately. If you are going to stand for something, even if you know it is unpopular, you have to stand for it. Do you think that the US is ever going to pull out of NATO or the WTO? No, but do you see Kucinich talking about how his ideas are going to fail?