It was one of the bedrock sales pitches for the Affordable Care Act: "If you like your health care plan, you will be able to keep your health care plan. Period." President Obama made variations of this pledge to Congress, a leading medical organization and town hall audiences across the country as he sought to reassure Americans that the largest overhaul of the health care system in 50 years would not force them to give up their existing insurance.
So much for guarantees. More than three years after Obamacare became law, little is working as planned. The federal website where people...