Starting Wednesday, the Affordable Care Act was in full force, as millions of uninsured Americans either now have health coverage or will get it this year. But experts say that's just one of many changes to watch for in 2014, including how the law will affect elections, what the states will decide about Medicaid expansion, and what insurers will do to react to their quickly changing demographics. Already, at least 1.1 million people have gained coverage through the federal exchange, HealthCare.gov, and the federal and state exchanges stand to enroll millions more through the cut-off date at the end of March.
