The slow rollout of a new federal health insurance marketplace may be deepening differences in health coverage among Americans, with residents in some states gaining insurance at a far greater rate than others. The demarcation may be as simple as Democrat and Republican. Newly released federal figures show more people are picking private insurance plans or being routed to Medicaid programs in states with Democratic leaders who have fully embraced the federal health care law than in states where Republican elected officials have derisively rejected what they call "Obamacare." On one side of the political divide are a dozen mostly Democratic leaning states, including California, Minnesota and New York.