Venn Diagrapm comparing the Republican and Democratic Debates - quite telling.

http://www.washingtonpost.com/news/wonkblog/wp/2015/10/14/a-handy-venn-diagram-of-the-very-different-debates-republicans-and-democrats-are-having/

That diagram covers policy topics that have received more than a passing reference in the three debates so far (sorry, we're not including the Republican under-card debates). To be fair, the Republicans have had two debates and the Democrats only one. But substantial time in both GOP debates has been devoted to questions about character and temperament — and things Donald Trump has said — that had little to do with specific policy topics. As for which field has covered more issues, the score is about even.

Debate topics are also admittedly chosen by moderators and not the candidates themselves, but the questioning has mirrored many issues on the campaign trail, and we've included topics candidates raised in their opening and closing remarks.