I wonder if he realizes that Southern slaveowners wanted to count them as full people....while Northerners, both abolitionists and nonabolitionists, wanted to them to be zeros?
That is absolute nonsense - complete leftist reasoning in service of Confederate special pleading.
Southern slaveowners specifically refused to recognizes slaves as people, even though they were.
Northerners refused to recognize them as qualified voters, because Northerners knew that the slaveowners would never let them vote.
The three-fifths ratio was a compromise between Northern reality and Southern fiction.
But when it came to a reckoning for tax apportionment the southern slavers didn’t want to count them at all. Like all true democrats they wanted their cake and to eat it too.