Dan Sickles had an interesting notion

I'm reading American Scoundrel, The Life of the Notorious Civil War General Dan Sickles by Thomas Keneally, where I came across this:

Asked to speak, Dan expressed his contempt for the Copperheads, who would countenance a divided nation. "Rather than see the Republic so degraded, let the last citizen perish; lay waste the continent; recall the red man from his long exile, and give back to the proud lords of the forest and plain the heritage we took from their fathers."