What's the story here?
REPRESENTATIVE IN THE GENERAL ASSEMBLY
ONE HUNDRED AND THIRTEENTH REPRESENTATIVE DISTRICT
VOTE FOR 1
(WITH 3 OF 3 PRECINCTS COUNTED)
(12) MELINDA HULT (REP). . . . . . 0
(13) JAY HOFFMAN (DEM) . . . . . . 4 100.00
East St Louis has an election commission separate from the county, so it has its own set of precincts that cannot cross the borders. The representative districts in IL do not have to follow municipal lines and in the case of ESL cut small parts off of three precincts into HD 113.
To illustrate I've posted this map showing two such small splits. The municipalities are shaded in red and the representative district boundary is blue. Precincts are from the 2010 election and were changed in 2011 after the map, but you can see the municipal commission ones for ESL and Belleville, and those from the county labeled by township name.
The shaded green areas are in both ESL and HD 113. At the time of the remap both those census blocks had 0 persons living in them, but they might have voters today. Also ESL could have annexed territory since 2010 that crossed into HD 113. The ESL election commission doesn't yet have a 2012 precinct map to identify where the 4 voters come from. I can say that they all come from new precinct 18, while pct 22 and pct 24 show 0 votes cast in the HD 113 race.
As for the presidential race, note that ESL is 98% black and less than 1% white. The results are consistent with other all black precincts in IL.