With the Democracy, Mr. Van Buren was still a general favorite. His friends felt that the wrong done him in 1840 should now be righted, and a large majority of his party undoubtedly favored his renomination. But his famous letter to Mr. Hammet, of Mississippi, dated March 27th, on the annexation of Texas, placed a lion in his path. In this lengthy and elaborate document he committed himself against the project of immediate annexation, and the effect was at once seen in the decidedly unfriendly tone of Democratic opinion in the South. He had been faithful to the Slave oligarchy in many things, but his failure in one was counted a breach of the whole law. By many acts of patient and dutiful service he had earned the gratitude of his Southern task-masters; but now, when driven to the wall, he mustered the courage to say, "Thus far, no farther"; and for this there was no forgiveness. General Jackson came to his rescue, but it was in vain. The Southern heart was set upon immediate annexation as the golden opportunity for rebuilding the endangered edifice of slavery, and Mr. Van Buren's talk about national obligations and the danger of a foreign war was treated as the idle wind. The Southern Democrats were bent upon his overthrow, and they went about it in the Baltimore Convention of the 27th of May as if perfectly conscious of their power over the Northern wing of the party. They moved and carried the "two-thirds rule," which had been acted on in the National Convention of 1832, and afterward in that of 1835, although this could not have been done without the votes of a majority of the convention, which was itself strongly for Van Buren. The rule was adopted by a considerable majority, the South being nearly unanimous in its favor, while the North largely "supplied the men who handed Van Buren over to his enemies with a kiss." Even General Cass, the most gifted and accomplished dough-face in the Northern States, failed to receive a majority of the votes of the Convention on any ballot, and James K. Polk was finally nominated as the champion of immediate annexation, with George M. Dallas as the candidate for Vice President.