If you were a Santorum voter in Illinois -- first, welcome, and I won't apologize for all of the shitty things I've said about your candidate. Anyway, you should probably take a look at the following Rachel Maddow segment about how your guy was basically shoved off the ballot in many of the voting districts in your state.
Sorry, Santorum voter. Maybe a lawsuit is in order.
Adding... Romney won the Illinois primary by 12 percentage points.