I am seeing him a lot in Chicago too.
I have no idea who would be the favorite here. The only signs and stickers I have seen are for Sanders.
Bloomberg has zero delegates running in the Illinois primary.
I’m not sure how the 34 At-Large delegates get selected
http://www.thegreenpapers.com/P20/IL-D#0317
I think he has a shot at those. Then there are the 20 superdelegates but they don’t vote until the 2nd ballot.
So even if Bloomberg won in a landslide at best he would get 34 out of 135 delegates - well under a majority.