The Democratic advantage in the electoral college may be waning

President Obama won the 2012 presidential election by 3.9pt. He took the 2008 election by 7.3pt. Yet, these margins underestimated his true strength. United States presidential elections are decided in the electoral college. Obama gained an extra advantage there, but history and new polling suggests that the next Democratic nominee might not be able to hold it. [cont.]

Harry Enten, The Guardian