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In 2012, the Supreme Court ruled the Affordable Care Act could not mandate each state to expand Medicaid eligibility. That decision, in effect, created a nationwide experiment to see how uninsured rates would change when states opened up the program to more low-income people.

The bottom line: States that didn't expand Medicaid have much higher uninsured rates compared with states that expanded Medicaid, according to the latest Census Bureau data. Hospitals and doctors in Medicaid expansion states consequently recorded more patient visits, although that has tapered off.

Newsworthy: Texas and Florida, states that did not expand Medicaid and are grappling with the aftermath of two massive hurricanes, have two of the highest uninsured rates in the country (16.6% in Texas and 12.5% in Florida).

Expand chart
Note: Thirty-one states and Washington, D.C. have expanded Medicaid as of January 1, 2017; Data: U.S. Census Bureau; Kaiser Family Foundation; Chart: Chris Canipe / Axios

Go deeper

Dan Primack, author of Pro Rata
48 mins ago - Podcasts

Net neutrality on the line under Biden

Federal net neutrality rules are back on the table in the Biden administration, after being nixed by Trump, but now might be complicated by the debate over social media companies' behavior.

Axios Re:Cap digs into why net neutrality matters and what comes next with Nilay Patel, editor-in-chief of The Verge and host of the Decoder podcast.

House grants waiver for retired Gen. Lloyd Austin to lead Pentagon

Defense Secretary nominee Lloyd Austin Photo: Chip Somodevilla/Getty Images

The House voted 326-78 on Thursday to grant retired Gen. Lloyd Austin a waiver to lead the Pentagon, clearing the way for the Senate to confirm President Biden's nominee for defense secretary as early as this week.

Why it matters: Austin's nomination received pushback from some lawmakers, including Democrats, who cited a law that requires officers be out of the military for at least seven years before taking the job — a statute intended to reinforce the tradition of civilian control of the Pentagon.

Amanda Gorman steals the show on Inauguration Day

Data: NewsWhip; Chart: Axios Visuals

Poet Amanda Gorman by far generated the most average interactions on social media on Inauguration Day, according to exclusive data from NewsWhip.