The nation's largest state-based health insurance exchange is touting early data from the CDC's National Health Interview Survey that finds for the first six months of 2017 the rate of uninsured Americans continued to decline in states that ran their own exchanges, while the rate increased slightly in states that used healthcare.gov. In general, the survey data found the national uninsured rate for people of all ages is 9 percent, statistically unchanged from 2016. But Covered California focused on survey...