John Qunicy Adams--Did not like Slavery

His views were uncommonly humane for the major party politician that in a sense he was. This was a man who rejected the comforting notion that the United States was a classless society; who believed, as did few of his male contemporaries, that women in America were denied the equal opportunities that were their due; who, unlike the slaveholding Jackson, believed that slavery was "the great and foul stain upon the North American Union" and that "the Constitution's protection of slavery was intolerable" and that it should be amended. Like his predecessors in the chief executive's office, he believed that the presidential veto was a potentially despotic power that was to be rarely exercised (in accord with Hamilton's promise to this effect in The Federalist ).

From Encyclopedia.com here.