[BroJoeK]

jeffersondem: "The Dred Scott decision was not necessary to legitimize slavery.
The United States Constitution did that upon adoption.
The U.S. Constitution enshrined slavery."

"Enshrined" is your word, not our Founders, FRiend.
In fact, our Founders' attitude toward slavery was very different from "enshrined".
They all believed -- even Southern slaveholders like Washington, Jefferson & Madison -- that slavery was a moral wrong which should be abolished, eventually.

They also believed Congress had full authority to abolish slavery in US territories, an authority which Crazy Roger Taney singlehandedly abolished in his Dred Scott Ruling.

As you well know, Cracy Roger's ruling P.O.'d a lot of Northerners, including this one:

"We shall lie down pleasantly dreaming that the people of Missouri are on the verge of making their State free; and we shall awake to the reality, instead, that the Supreme Court has made Illinois a slave State.

"To meet and overthrow the power of that dynasty, is the work now before all those who would prevent that consummation."
A.L. "House Divided" June 16, 1858

[jeffersondem]

” . . . which Crazy Roger Taney singlehandedly abolished in his Dred Scott Ruling.”

There were nine Supreme Court justices. No one justice “singlehandedly” makes a major ruling on behalf of the court. (Maybe one justice does, at times, serve as gatekeeper or issues a temporary injunction).

I'm a little surprised you did not know this.

[jeffersondem]

“To meet and overthrow the power of that dynasty, is the work now before all those who would prevent that consummation.”

If that was Lincoln’s announced intention, maybe he really did go to war to overthrow the pro-slavery constitution of the United States.