Before 2008, Virginia had not voted for a Democrat to be president since 1964. The state is seen as a critical swing state in 2012 and there can be some useful insights gleaned from the 2008 exit polls and by reflecting on the changes that have happened since then.  Virginia has differences from the rest of the United States in several respects: * In 2008, Virginia had a greater share of African-Americans but a smaller proportion of Latinos. In general, each group was slightly more conservativ...