CHICAGO - Illinois might seem the least likely place for the health care law to get sidelined. It’s a state with a Democratic governor and solid Democratic majorities in both houses of the Legislature. It’s also the political base of President Obama, who championed the legislation in the face of furious opposition.

Yet even here, voters are divided on the law’s merits, and a bill authorizing creation of a state-based health insurance exchange - a centerpiece of the law designed to expand coverage to millions of people - has been stalled while state lawmakers wait to see how the court rules.