Caucuses are weird beasts anyways- they are not a popularity contest where the candidate with the most votes necessarily wins- the winner is the one with the best organization which convinces others to switch to their candidate. In 2011, Ron Paul led by only one point going into the Republican Caucus and received all of the delegates. Polls don't always mean much in caucus states like Iowa. Ron did well in caucus stated but struggled in primary states which rely just on the popular vote.
Des Moine paper wants Warren and have endorsed her .