The uninsured rate rose 1.3 percentage points to 12.2% last year, according to the Gallup-Sharecare Well-Being Index. That represents an increase of roughly 3.2 million Americans.
Under Obamacare, the uninsured rate plummeted to a low of 10.9% at the end of 2016. Obamacare’s exchanges opened in 2014, the same year Medicaid expansion began and the individual mandate — which required nearly all Americans to have insurance or pay a penalty — took effect.
Those provisions helped reverse a soaring uninsured rate, which hit a peak of 18% in the fall of 2013, fueled in part by the aftermath of the Great Recession.
Several factors likely contributed to the increase last year. President Trump and congressional Republicans tried repeatedly, but unsuccessfully, to repeal the landmark health reform law. That may have led some Americans to question whether the administration would enforce the penalty for not having insurance, according to Gallup-Sharecare.