The Whig party was the nearest to the anti-slavery society of any of the political organizations of the time. It had promised, in convention assembled, "to promote all constitutional measures for the overthrow of slavery, and to oppose at all times, with uncompromising zeal and firmness, any further addition of slave-holding States to this Union, out of whatever territory formed.[15] But the party never got beyond this. Charles Sumner was a member of the Whig party, but was greatly disturbed about its indifference on the question of slavery. In 1846 he delivered a speech before the Whig convention of Massachusetts on "_The Anti-Slavery Duties of the Whig Party_." He declared his positive opposition to slavery; said that he intended to attack the institution on constitutional grounds; that slavery was not a "covenant with death or an agreement with hell"; that he intended to do his work for the slave inside of the Constitution. He said:-- "There is in the Constitution no compromise on the subject of slavery of a character not to be reached legally and constitutionally, which is the only way in which I propose to reach it. Wherever power and jurisdiction are secured to Congress, they may unquestionably be exercised in conformity with the Constitution. And even in matters beyond existing powers and jurisdiction there is a constitutional mode of action. The Constitution contains an article pointing out how at any time amendments may be made thereto. This is an important article, giving to the Constitution a progressive character, and allowing it to be moulded to suit new exigencies and new conditions of feeling. The wise framers of this instrument did not treat the country as a Chinese foot, never to grow after its infancy, but anticipated the changes incident to its growth." He proposed to the Whigs as their rallying watchword, the "REPEAL OF SLAVERY UNDER THE CONSTITUTION AND LAWS OF THE FEDERAL GOVERNMENT." Discussing the methods, he continued:-- "The time has passed when this can be opposed on constitutional grounds. It will not be questioned by any competent authority that Congress may by express legislation abolish slavery, first, in the District of Columbia; second, in the territories, if there should be any; third, that it may abolish the slave-trade on the high seas between the States; fourth, that it may refuse to admit any new State with a constitution sanctioning slavery. Nor can it be doubted that the people of the free States may, in the manner pointed out by the Constitution, proceed to its amendment." Thus did Charles Sumner lay down a platform for a _Political Abolition Party_, and of such a party he became the laurelled champion and leader.