Two well-placed sources on Capitol Hill say that the Congressional Budget Office effectively used Jonathan Gruber’s model to score Obamacare. That model favors government mandates over market competition and claims that essentially the only way to achieve a large reduction in the number of uninsured Americans is to impose an Obamacare-like individual mandate. Moreover, because the model that the CBO used in scoring Obamacare is the same one it uses today, any alternative to Obamacare that doesn’t include an individual mandate — which is to say, any conservative alternative — would be scored by the CBO as falling well short,...