“On May 23, 1851, Frederick Douglass announced that he changed his opinion about the U.S. Constitution.
From that point forward, Douglass believed that it’s an anti-slavery document. During his comments he said, “…we have arrived at the firm conviction that the Constitution…in light of well established rules of legal interpretation…might be made consistent with the noble purposes in it’s preamble. And hereafter…we should insist its application be wielded in the behalf of emancipation.”
Douglass published this annoucement in “The North Star” which was his own newspaper.”