The uninsured rate had been steadily declining for a decade. But now it’s rising again.

The number of uninsured Americans is increasing for the first time since Obamacare passed.

The number of uninsured Americans is rising again, according to the Census Bureau, an abrupt reversal of a trend of increased coverage since the Affordable Care Act became law.

In 2018, the number of people in the United States without health insurance rose to 27.5 million, up from 25.6 million in 2017. The uninsured rate jumped from 7.9 percent in 2017 to 8.5 percent in 2018. It was the first year-to-year increase in uninsured rates since...