"Contrary to the frequent presentations by modern liberals, the 'three-fifths clause' of the Constitution was the anti-slavery movement's response to slave owners who wanted their slaves as property, except when it came to counting population for representation in the U.S. House of Representatives. In which case the slave owners wanted them counted as people. Thus the move to block slave owners’ power by reducing a slave to “three-fifths” of a person, with the objective of eventually phasing out slavery altogether. Alas, the birth of political factions, parties, took place rapidly, to the chagrin of President George Washington. In the battles between Thomas Jefferson and Alexander Hamilton the Democratic-Republican Party, the ancestor of today’s Democrats was born. And the pro-slavery, judge-people-by-skin-color faction became the central, and as it played out, perpetual, driving force of the Democratic Party."
January 1, 1970
https://en.wikiquote.org/wiki/United_States_Constitution