To mark the second anniversary of President Obama’s health care overhaul, voters should turn to his home state of Illinois to see how it will deliver on its promise of quality health care for the most vulnerable. When they do, they will probably not like what they see.

As a state senator, President Obama sponsored and supported large expansions of the state’s Medicaid program, similar to the ones in his national health care reform bill. These expansions have led to worsening care for the very people Medicaid was meant to protect.