The conservative approach to keeping Americans from taking advantage of the Affordable Care Act always has featured a large element of fear-mongering. Remember the "death panels"? Sticker shock?
That these things haven't come true hasn't kept congressional Republicans from conjuring up a new threat: that if the Supreme Court rules against Obamacare tax subsidies in the King vs. Burwell case, millions of Americans will face huge retroactive tax bills.
Judy Solomon, vice president for health policy at the Center on Budget and Policy Priorities, has taken a look at this argument. Her ruling: