Non-Sequitur and other posters on the other side were arguing from the Ordinance, much as Ditto does above, that Congress had the power to exclude slaveholders from United States Territories by statutes. Which of course was Abraham Lincoln's, the Free Soilers', and the Northern Whigs' argument as well.
So the FR debate record has gone missing but the brief supporting your side of the debate is found. Isn't that kinda convenient LG?
First you invent a phony southern caricature and assign him a reoccurring spot in Alfred Hitchcock films, then you fabricate a Senate cloakroom railroad deal between Douglas and Davis, now an imagined debate on FR where upon, it was determined that NorthWest Ordinance was unconstitutional.
In each instance your opponent is left looking for something that doesn't actually exist.
I think we're beginning to see a pattern of practice emerging here pardner.
Lolz.