HEALTH CARE’S silly season is upon us. If we can be sure of anything, it is that President Barack Obama and his congressional allies will do whatever they can to hide the cost of their health plan. Lucky for them, former Massachusetts Gov. Mitt Romney, a Republican, has shown the way. In 2006, Romney enacted a health-reform package strikingly similar to what Democrats are pushing through Congress, including individual and employer mandates, private health-insurance subsidies, broader Medicaid eligibility and a new health-insurance “exchange.” Lately, Massachusetts officials have been forced to raise taxes and cancel some residents’ coverage to pay for...