A week ago, a Clinton victory in the Democratic primary appeared inevitable. Hillary Clinton had won a number of southern contests by large majorities and was nearing “presumptive nominee” status. Even Bernie Sanders admitted that his campaign “got decimated” in South Carolina a few weeks ago. But this Scenario might have changed last week, when Bernie Sanders pulled off a shocking upset in Michigan. In fact, Nate Silver called the results in Michigan “among the greatest polling errors in primary history”. This surprising victory has energized the Sanders campaign. So was the Michigan result an aberration or a sign of deeper Sanders’ support and momentum in the Midwest? This answer may lie in Ohio’s Democratic primary today.