People are starting to get letters telling them their health insurance plans have been canceled because of the Affordable Care Act. Because the letters will go out just before the midterm congressional elections, they are likely to get a lot of attention. There have been several stories this past week. But the people affected will represent only a small fraction of the population with health insurance. The cancellations are occurring at the state level, and some insurance regulators don't require any reporting, so a precise head count is difficult. But it appears that as many as several hundred thousand people will find their plans canceled this year.