The conspiracy is nearly completed. The Legislation of the Republic is in the hands of this handful of Slaveholders. The United States Senate assures it to them. The Executive power of the Government is theirs. Buchanan took the oath of fealty to them on the steps of the Capitol last Wednesday. The body which gives the supreme law of the land, has just acceded to their demands, and dared to declare that under the charter of the Nation, men of African descent are not citizens of the United States and can not be -- that the Ordinance of 1787 was void -- that human Slavery is not a local thing, but pursues its victims to free soil, clings to them wherever they go, and returns with them -- that the American Congress has no power to prevent the enslavement of men in the National Territories -- that the inhabitants themselves of the Territories have no power to exclude human bondage from their midst -- and that men of color can not be suitors for justice in the Courts of the United States!