to prohibit slavery in any territory, and that any attempt to do so would be a violation of constitutional rights and lead to a dissolution of the Union. No vote was ever taken on this resolution, and it was nothing more than a deliberate attempt to force the issue with the North. The Thirtieth Congress met December 6, 1847, and had among its members Abraham Lincoln, of Illinois, and Andrew Johnson, of Tennessee, the former elected as a Whig and the latter as a Democrat; in the Senate Stephen A. Douglas, of Illinois, took his seat for the first time in that body. Opposition to the war was strong, and it was finally closed by the Treaty of Guadalupe Hidalgo, signed February 2, 1848; by its terms vast stretches of new territory were acquired by the United States. This land had been free soil by the Laws of Mexico since 1827, but the South, as a matter of course, expected, and had planned, to make it slave soil, and she was determined to oppose to the utmost any attempt to keep slavery out of this new territory; the North was equally determined that it should remain free. The campaign of 1848 came on with the question undecided. The Democratic Convention nominated Lewis Cass, of Michigan, and adopted a platform similar to those of 1840 and 1844, but nothing was said about slavery in the new territory. The Whigs nominated Major-General Zachary Taylor, of Louisiana, for President, and Millard Fillmore, of New York, for Vice-President, and their Convention adjourned without adopting any platform at all.