"Will mankind never learn that policy is not morality,--that it never secures any moral right, but considers merely what is expedient? chooses the available candidate,--who is invariably the devil,--and what right have his constituents to be surprised, because the devil does not behave like an angel of light? What is wanted is men, not of policy, but of probity,--who recognize a higher law than the Constitution, or the decision of the majority."