"Now, I confess myself as belonging to that class in the country who contemplate slavery as a moral, social and political evil, having due regard for its actual existence amongst us and the difficulties of getting rid of it in any satisfactory way, and to all the constitutional obligations which have been thrown about it; but, nevertheless, desire a policy that looks to the prevention of it as a wrong, and looks hopefully to the time when as a wrong it may come to an end."