The lawsuit — backed by the Trump administration — threatens to overturn Obamacare’s ban on preexisting conditions. (Mark Wilson/Getty Images)

A Texas judge has issued a ruling finding the 2010 Affordable Care Act unconstitutional. If upheld on appeal, this ruling would invalidate policies including health insurance protection for pre-existing conditions and Medicaid expansion. Liberal and conservative legal scholars have criticized the judge’s reasoning and say the ruling is likely to be overturned.