23 maps that explain how Democrats went from the party of racism to the party of Obama

"The Democratic Party is the longest-existing political party in the US, and arguably the world. But in its over 180 year existence, it's completed a remarkable ideological and geographic transformation. Originally a staunch defender of Southern slavery, the party now wins the support of most nonwhite voters. Once an advocate of rural interests against coastal elites, the party now draws much of its strength from cities and coastal areas. These maps tell the tale of the Democratic Party's origins, its various metamorphoses, and the sources of its strength — and weaknesses — today. ..."
Vox (July 29, 2016)