Which "States' rights" the North had a right to defend by not ratifying the Constitution.
You are talking about Article IV of the Constitution as it was written. "Trample", hogwash.
The Northern reaction to Southern bullying was the source of the widespread support that produced the rapid early growth of the GOP.
Blatant falsehood. The Northerners were always the aggressors on sectional issues. They rejected Missouri statehood, they rejected Texas statehood, and they demanded admission for Oregon despite Oregon's having a state constitution and ordinances that prohibited what the Constitution permitted. They started it, and they killed a million people to have things their way.
Maybe the Northern States shouldn't have ratified the Constitution in the first place. Maybe they should have had their own Union.
Which was?