You said, "the whole of the United States was founded on slavery." That statement is what I take issue with. If you feel like amending that, to something like "some parts of the United States leaned heavily on the use of slavery", I would agree. It's the extreme claim of your first statement that I take issue with.
In general, you've limited your claims to some of the original 13 states / colonies. That's a far cry from "the whole of the United States". I'd like to see your sources for each of the other 50 states, that they were each founded on slavery.
Not only that, but you seem to be defending your very general statement by only looking at a very limited time frame. Were each of the states so heavily dependent on slavery that it could be said that, e.g., Wyoming or Wisconsin or even Alaska were founded on slavery?
I don't think so.