So it's going to come down to who has the better ground game, and also who can compete statewide. If Bernie just runs up the margins in urban centers like Des Moines, Cedar Rapids, or Iowa City and performs poorly in rural areas, Clinton would probably end up with more delegates even if both candidates are close in the popular vote. Another variable is O'Malley's supporters and where they'll go, because I don't see him crossing the threshold in most precincts. I mean, if they were anti-Clinton then I'm sure they would've jumped ship to Bernie by now, but if they were pro-Clinton then they would've also jumped ship to her by now. So who knows.