I saw this video the other day. Now, I know only Ron Paul was given the opportunity to answer this question, so it may seem unfair to use his answer as a reason to support him. But ask yourself, what would the other candidates have said?
Paul is the only candidate, from either party, who seems to have a really firm grasp on the whole Constitution and Bill of Rights, and a genuine interest in enforcing it. If we want a return to a free country, made up of united states, not one big state, Ron Paul is the best candidate for our country.