But what you could not do is grow cotton in New Mexico until they found a way to build modern irrigation systems, which didn't start being constructed until 1915.
And slaves in mines (if white miners would even allow that) would use hardly any slaves compared to cash crops. It would be a tiny little group and nothing like the fear-mongering people tried to scare people with in the 1850s.
Slaves were not used to build the levees around New Orleans because the threat of death from mosquito borne illnesses and horrible living conditions was so high. It is true that slavery is one of the most immoral and egregious institutions ever existing in the world, but slaves had value. Slaves did participate in building the levees along the Mississippi, but not where the worst health threat conditions existed. Irish immigrants, on the other hand, such as my ancestor who died there, had no monetary value.
Your former President strongly disagreed with you.
One of the positions laid down by the honorable Senator from Kentucky, and which he denominated as one of his two truths, was, that slavery was excluded from the Territories of California and New Mexico by a decree of Nature. From that opinion I dissent. I hold that the pursuit of gold-washing and mining is better adapted to slave labor than to any other species of labor recognized among us, and is likely to be found in that new country for many years to come. I also maintain that it is particularly adapted to an agriculture which depends upon irrigation. Till the canals are cut, ditches and dams made, no person can reclaim the soil from Nature; an individual pioneer cannot settle upon it with his family, and support them by the product of his own exertion, as in the old possessions of the United States, where rain and dew unite with a prolific soil to reward freely and readily the toil of man. It is only by associated labor that such a country can be reduced to cultivation. They have this associated labor in Mexico under a system of peonage. That kind of involuntary servitude, for debt I suppose, cannot long continue to exist under American institutions; therefore the only species of labor that can readily supply its place under our Government would, I think, be the domestic servitude of African slavery; and therefore I believe it is essential, on account of the climate, productions, soil, and the peculiar character of cultivation, that we should during its first settlement have that slavery in at least a portion of California and New Mexico.
And you’re still a moron.