19 February 2020 - When the Affordable Care Act became law in 2010, public opinion of it was narrowly divided and deeply partisan. 

Our review of 102 nationally representative public opinion polls in the period 2010–19 reveals that opinion remains divided and has shifted in a sustained way at only two points in time: in a negative direction following technical problems in the first enrolment period, and in a positive direction after President Donald Trump’s election and subsequent Republican repeal efforts. 

In late 2019 the ACA was more popular than ever, yet partisan divisions have gotten larger rather than smaller.

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