Subject: Re: Our Founding Fathers Said What?
It would have given the Southern states a lot more representatives, and more power. Obviously. Which is exactly what they wanted, and what they proposed. The Northern states didn't want to count them at all because they had no voting rights. It also would have affected their taxes at the time (more people, more tax owed to the feds). Madison ended up proposing the 3/5 compromise that both sides could live with, and detailed his reasoning in Federalists 54 and 55.

Exactly right.
And if the southern states had had more electoral votes due to their population of slaves - who didn't get to vote - then Congress and the Presidency look much different going forward. Stephen Douglass becomes President instead of Abe Lincoln, for one.

There would also be no Missouri compromise, and that would mean potentially more slave states at northern latitudes.

The folks who pan the 3/5ths compromise should check their knowledge of history...and of the Founding Fathers. Because it's lacking.