“I will not sign a plan that adds one dime to our deficits, either now or in the future,” Barack Obama swore to us during the health care debate. Some 2.5 trillion dimes later, it’s clear the president had no idea what he was talking about. The latest numbers from the Congressional Budget Office project that Obamacare will drive up deficits by $250 billion in the first 10 years. Then again, the CBO also predicted that the original Medicare program would only cost $12 billion by 1990. Its actual price tag was $110 billion. Missed it by that much. Republican...