A Cincinnati newspaper printed a malevolent editorial proclaiming that [Andrew] Jackson’s mother was a common prostitute brought to this country by British soldiers. thereupon she married a mulatto man with whom she had several children, among them Andrew Jackson. Apprised of this far-fetched, scandalous tale, [John Quincy] Adams thought it absurd, but cynically went on to comment that even if proved true it would probably not hurt Jackson. The course of the campaign seemed to substantiate all Adams’s apprehensions that fervent partisanship was demolishing reasonableness, a slugfest of calumny and lies replacing political civility. Vice was triumphing over virtue. And the cynicism expressed in his reaction to the malignant piece regarding Jackson’s mother and his birth signaled that he had begun to doubt the probity of the republic and its citizens.
That is from the very good book by William J. Cooper, The Lost Founding Father: John Quincy Adams and the Transformation of American Politics.