A very bitter controversy over the question began in the Senate as soon as the House resolution was received. But from the outset it was apparent that those who adhered to the 54 deg. 40' policy, on which Mr. Polk had been elected, were in a small minority. That minority was led by General Cass; but its most brilliant advocate in debate was Edward A. Hannegan, Democratic senator from Indiana, who angrily reproached his party for playing false to the pledges on which it had won a victory over the greatest political leader of the country. He measured the situation accurately, read with discrimination the motives which underlay the change of policy on the part of the administration and its Southern supporters, and stated the whole case in a quick and curt reply to an interruption from a pro-slavery senator,--"If Oregon were good for the production of sugar and cotton, it would not have encountered this opposition. Its possession would have been at once secured." The change in the Democratic position was greatly aided by the attitude of the Whig senators, who almost unanimously opposed the resolution of notice to Great Britain, as passed by the House. Mr. Webster, for the first if not the only time in his senatorial career, read a carefully prepared speech, in which he did not argue the question of rightful boundary, but urged that a settlement on the line of the 49th parallel would be honorable to both countries, would avert hostile feeling, and restore amity and harmony. Mr. Berrien of Georgia made an exhaustive speech, inquiring into the rightfulness of title, and urged the line of 49 deg.. Mr. Crittenden followed in the same vein, and in a reply to Senator William Allen of Ohio, chairman of Foreign Affairs, made a speech abounding in sarcasm and ridicule. The Whigs having in the campaign taken no part in the boastful demand for 54 deg. 40', were not subjected to the humiliation of retracing imprudent steps and retracting unwise declarations. Under the influences at work in the Senate, events developed rapidly. The House resolution of notice was defeated; and the Senate passed a substitute of a less aggressive type, in which the House, through the instrumentality of a conference committee, substantially concurred. The resolution as finally adopted authorized the President "at his discretion" to give notice for the termination of the treaty to Great Britain. The preamble further softened the action of Congress by declaring that the notice was given in order that "the attention of the governments of both countries may be the more earnestly directed to the adoption of all proper measures for a speedy and amicable adjustment of the differences and disputes in regard to said territory."