4. Will anybody watch? The website Vox.com has pointed out that Saturday debates are rare. Of 100 debates since 2000, only seven have been on a Saturday. (Thursday is the most popular day for debates, by the way.) And as The Daily Kos pointed out, the Democratic National Committee might have scheduled the debates so fewer people would see them.
5. How local do the questions get? Two of the four questioners are Iowa-based journalists. If Sanders or O'Malley have an opening, it could be to position themselves contrary to Clinton on Iowa-centric questions. Sanders has already come out against the Bakken pipeline proposal, which would run an oil pipeline across the state from North Dakota to Illinois. Clinton has yet to take a position.