...Where exactly do slave owners Washington, Jefferson, Madison, Monroe, Jackson, Tyler et al fit in all of this...
Would be fair to say that the majority of slaves were owned by deep South democrats. Jefferson started the Democrat Republican party. Jackson was a Democrat.
Washington was the largest slave owner of his day and wasn’t a Democrat.
Jefferson and Madison founded the Democrat-Republican Party. That party elected Jefferson, Madison, Monroe, and that famous southern slave owner, John Quincy Adams.
“Would be fair to say that the majority of slaves were owned by deep South democrats.”
You mean like John Calhoun, Whig, Henry Clay, Whig, Zachary Taylor, Whig, John Tyler, Whig?