As Americans across the nation begin to find out what Obamacare has in store for them, many of Mississippi's most needy will find out the answer is nothing. That is likely the case for William and Leslie Johnson of Jackson County, since the state decided not to expand the Medicaid program for the poor under President Barack Obama's Affordable Care Act. As a result, nearly 300,000 adults there will fall through the cracks of healthcare reform. Many are the working poor - truckers, childcare workers, mechanics - who make too much money each month to qualify for Medicaid under Mississippi's existing criteria but not quite enough to get government help buying private health insurance on an Obamacare exchange.