Original Sources - An Anti-Slavery Protest (1837)
William Channing's letter to Henry Clay opposing the annexation of Texas not only makes arguments against the spread of slavery, but shows a different understanding of the "purpose" of the "forwarding of the Revolution", the elevation of society and the working class - this language can support a progressive vision of government or white supremacy in promoting white labor over slavery
By this act, slavery will be spread over regions to which it is now impossible to set limits. Texas, I repeat it, is but the first step of aggressions. I trust, indeed, that Providence will beat back and humble our cupidity and ambition. But one guilty success is often suffered to be crowned, as men call it, with greater; in order that a more awful retribution may at length vindicate the justice of God, and the rights of the oppressed. Texas, smitten with slavery, will spread the infection beyond herself. We know that the tropical regions have been found most propitious to this pestilence; nor can we promise ourselves, that its expulsion from them for a season forbids its return. By annexing Texas, we may send this scourge to a distance, which, if now revealed, would appal us, and through these vast regions every cry of the injured will invoke wrath on our heads.
It is the great mission of this country, to forward this revolution, and never was a sublimer work committed to a nation. Our mission is to elevate society through all its conditions, to secure to every human being the means of progress, to substitute the government of equal laws for that of irresponsible individuals, to prove that, under popular institutions, the people may be carried forward, that the multitude who toil are capable of enjoying the noblest blessings of the social state. The prejudice, that labor is a degradation, one of the worst prejudices handed down from barbarous ages, is to receive here, a practical refutation. The power of liberty to raise up the whole people, this is the great Idea, on which our institutions rest, and which is to be wrought out in our history. Shall a nation having such a mission abjure it, and even fight against the progress which it is specially called to promote?