Repealing the Affordable Care Act is a top priority for President-elect Trump. The Left is already sounding alarms, with many pointing to the millions of newly insured Americans who benefit from the law.

It’s right to be concerned about the fate of those who’ve enrolled in the Affordable Care Act. But it’s also important to understand what the Affordable Care Act’s insurance expansion actually was: For the most part, it was a large-scale expansion of Medicaid, the federal government’s health insurance program for the poor.