We are living in a very different political climate today but interesting to draw the comparisons of the 2008 Iowa Dem Caucus -

White voters split their vote:
Obama: 33%
Hillary: 27%
Edwards: 24%

This gave Obama an opportunity to consolidate the minority vote Only 4% of the voters were African-American but Obama received a whopping 72% of their vote.

Other minority votes consisted of only 3% of the vote but Obama had nearly double Hillary’s share of their vote.