I say that we must not interfere with the institution of slavery in the States where it exists, because the Constitution forbids it, and the general … - Abraham Lincoln

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I say that we must not interfere with the institution of slavery in the States where it exists, because the Constitution forbids it, and the general welfare does not require us to do so. We must not withhold an efficient Fugitive Slave law, because the Constitution requires us, as I understand it, not to withhold such a law. But we must prevent the outspreading of the institution, because neither the Constitution nor general welfare requires us to extend it. We must prevent the revival of the African slave trade, and the enacting by Congress of a Territorial slave code. We must prevent each of these things being done by either Congresses or courts. The people of these United States are the rightful masters of both Congresses and courts, not to overthrow the Constitution, but to overthrow the men who pervert the Constitution.