By getting a win on his top legislative priority, Pritzker has displayed the power Democrats now wield in Springfield with control of the governor’s office and both chambers of the legislature. But he also risks alienating the Republican lawmakers and business interests he vowed to work with when he was sworn in last month. And the issue reopened well-worn regional divides in Illinois, as lawmakers split over whether the Chicago area should have a higher minimum wage than Downstate areas, which often have a lower cost of living.