It's looking like a lot of people are going to have little Obamacare choice next year.One-third of the United States may have just a single insurer to pick from on Obamacare marketplaces in 2017, an analysis released Friday suggests. Seven entire states are projected to have just one carrier in 2017: Alaska, Alabama, Kansas, North Carolina, Oklahoma, South Carolina and Wyoming, according to research by the Avalere consultancy. And more than half of the country, 55 percent, may end up having two or fewer insurers to choose from on those government-run exchanges, Avalere said. "And there may be some sub-region...