Advocates on the left finally have one data point to show that President Obama’s signature domestic accomplishment is working. Last week, the U.S. Census Bureau reported that a half-million more 18- to 24-year-olds had health insurance in 2010 than did in 2009.

There is no hard evidence of a link, but it is perfectly reasonable to assume that this demographic increased their health insurance coverage, while all other demographics saw their coverage rates fall, thanks to the Obamacare provision that forces insurance companies to allow parents to add their adult children to their employer-provided health plan.