“There is nothing which I dread so much as a division of the republic into two great parties”*…

Ratios of Democrats (blue) vs. Republicans (red). Data source: Campaign contribution data from the FEC.
Just some of the occupations covered in Verdant Labs‘ “Democratic vs. Republican Occupations” (a note on methodology here).
* John Adams
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As we choose up sides, we might recall that it was in this date in 1914 that Franz Ferdinand, 51 year old heir to the Austro-Hungarian Empire, was assassinated in Sarajevo, then the capital of Bosnia and Herzegovnia, where he was visiting to inspect the Empire’s troops. A member of the Black Hand nationalist group, Gavrilo Princip, shot and killed both the Crown Prince and his wife as they were being driven through the city. The assassination– triggering, as it did, competing accusations and the “calling” of interlocking alliances– ignited World War I, which broke out one month later.

Franz Ferdinand