Which states, counties have the largest uninsured population?

The New York Times has created an interactive map outlining each state and county's uninsured rates.

Two organizations — Enroll America and Civis Analytics — worked together to gather the data used in the map.

Here are four findings from the map.

1. On the whole, states with the highest uninsured rates are in the South and Southwest. States such as Mississippi, Texas and Florida have higher uninsured rates. For the first half of 2015, Mississippi's uninsured rate was 14.2 percent, Texas' was 20.8 percent and Florida's was 15.2 percent, according to Gallup. Comparatively, Wisconsin's uninsured rate during the same period was 5.6 percent and Vermont's was 4.6 percent.

2. Medicaid expansion is a predictor of uninsured rates. States that have expanded Medicaid are seeing lower uninsured rates. In Illinois, which expanded Medicaid, the uninsured rank sank from 15.5 percent in 2013 to 8.8 percent in the first half of 2015. In Missouri, which didn't expand Medicaid, the uninsured rate only slightly decreased from 15.2 percent in 2013 to 11.4 percent in the first half of 2015.

3. Politics play a key role. While some Republican-leaning states have expanded Medicaid, most have not. As the map shows, states run by Republican governor  generally have higher uninsured rates than ones led by Democrats.

4. The Affordable Care Act has had a considerable effect. In 2013, there were only 10 states where the percentage of residents without health insurance was lower than 9 percent. Although this year's map is similar to the 2014 map, it shows undeniable improvements have been made since 2013.

Click here to see the interactive map.

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