Here's how the map showing how Medicaid expansion looks today:
In the new Census analysis, the researchers compared states that had expanded Medicaid as of Jan. 1, 2015 to those that hadn't, and depicted two portraits of uninsurance in America. The darker blue a state is shaded, the greater the uninsurance rate. It is quite clear from the two maps below, the non-expansion states tend to have higher rates of uninsurance.
The report notes that the uninsurance rate decreased among poor people in both kinds of states. The drops in the uninsured rate were bigger for people who made below the poverty level or up to 399 percent of the poverty level in states that expanded Medicaid. Not all the uninsured in each state would qualify for insurance, but a Kaiser Family Foundation analysis, based on last year's data, found that 19 percent of the population of those states that haven't expanded Medicaid -- close to 3 million people -- fell in the coverage gap and would be eligible if Medicaid were expanded.