One Illinois political source told Breitbart News that, in early voting, there has been a significant drop-off in people voting for a candidate, but not voting for individual delegates. In other words, people are voting for their chosen candidate for the nomination, but not completely the ballot by voting for delegates.
In 2012 Romney got 42 delegates and Santorum got 12. To see what that looked like go to ...
http://www.thegreenpapers.com/P12/IL-R
... and scroll down to the district results.
With this type of delegate selection just about anything could happen.
2016
http://www.thegreenpapers.com/P16/IL-R
Ted Cruze is like a prize fighter who is getting his ass kicked the entirely fight but still wants to go the distance because he thinks the judges are crooked and he’ll win the decision.