The last legal challenge remaining to the Affordable Care Act is a missing clause in the statute, which means, to some, that the subsidies now made available to make individual health insurance more affordable actually illegal. This issue has been kicking around for some time, but now the case has been brought to the US Court of Appeals in Washington, DC. According to Michael Cannon, director of health policy studies at the Cato Institute, “they miscalculated…everyone assumed that all states would establish exchanges” and “this was a drafting error that was made nine times. That tells you, no, this wasn’t an error. It was done deliberately.”