Ten years after Mr.Calhoun was in his grave, the same doctrine, in almost the same form of expression, became familiar to the country as the Southern justification for resorting to civil war.
The prompt result of Mr.Calhoun's efforts was a treaty of annexation which had been discussed but not concluded under Mr.Upshur.

It was communicated to the Senate by the President on the 12th of April, 1844.

The effect which this treaty produced on the political fortunes of two leading statesmen, one in each party, was extraordinary.
Prior to its negotiation, the Democrats throughout the Union were apparently well united in support of Mr.Van Buren as their Presidential candidate.

Mr.Clay was universally accepted by the Whigs,--his nomination by a national convention being indeed but a matter of form.

Relations of personal courtesy and confidence, if not of intimate friendship, had always subsisted between Mr.
Clay and Mr.Van Buren during their prolonged public service.