The Chicago metropolitan area has grown dramatically over the years. Formally Republican (mostly RINOS) areas have drifted even further to the left.
Many suburbs have been inundated with immigrants from all over the world. Not the poor teeming masses either. They've got money, attitude and they vote Democrat. Blacks and Mexicans who can afford it, escape the Cook County insanity and move to the suburbs bringing their voting habits along also.
I just don't see how the rest of the state can hold off the flood of leftist skullduggery. If you think putting your faith in Federal Courts to protect your rights is silly, then depending on Illinois courts is a real laugher.
My FOID card literally broke in half the week before I moved out of the state. It felt sooo good to just toss it in the trash.