A Sense of Justice: The Origin of the Drops of Wine at the Seder

The origin of taking out ten or sixteen drops of wine from our cups at the Seder while reciting the 10 Plagues has a fascinating origin.  Is it worth recovering?  I think so, and I connect it to the support for both Donald Trump and Bernie Sanders across the electorate today, as well as connect it to the custom of chanting Aleinu at the end of every service.