As a single-payer advocate who is also a doctor, I was concerned after the Affordable Care Act was passed that it didn’t do enough to combat rising underinsurance. A recent study by the Commonwealth Fund, which used new data to demonstrate that in 2012 some 31.7 million Americans were underinsured (i.e. insured, but still with heavy additional out-of-pocket health care expenses), argued that the burden of underinsurance will likely lessen as the ACA fully unfolds. But is there really reason for such optimism? See the article here in Salon.