[9] Five years later (1853), by another treaty with Mexico, negotiated by James Gadsden, we acquired a comparatively small tract south of the Gila, called the Gadsden Purchase (compare maps, pp. 330, 352). The price was $10,000,000. The purchase was made largely because Congress was then considering the building of a railroad to the Pacific, and because the route likely to be chosen went south of the Gila. [10] As early as 1846 the North attempted to decide the question in favor of freedom. Polk had asked for $2,000,000 with which to settle the boundary dispute with Mexico, and when the bill to appropriate the money was before the House, David Wilmot moved to add the proviso that all territory bought with it should be free soil. The House passed the Wilmot Proviso, but the Senate did not; so the bill failed. The following year (1847) a bill to give Polk $3,000,000 was introduced, and again the proviso was added by the House and rejected by the Senate. Then the House gave way, and passed the bill; but the acquisition of California and New Mexico by treaty left the question still unsettled. [11] Their platform declared: (1) that Congress has no more power to make a slave than to make a king; (2) that there must be "free soil for a free people"; (3) that there must be "no more slave states, no more slave territories"; (4) that "we inscribe on our banner, 'Free soil, free speech, free labor, and freemen.'" [12] The Liberty party nominated John P. Hale of New Hampshire, but he withdrew in favor of Van Buren. The Liberty party was thus merged in the Free-soil party, and so disappeared from politics. The Democratic candidates for President and Vice-President were Lewis Cass and William O. Butler. [13] Zachary Taylor was born in Virginia in 1784, was taken to Louisville, Kentucky, while still a child, and grew up there. In 1808 he entered the United States army as a lieutenant, and by 1810 had risen to be a captain. For a valiant defense of Fort Harrison on the Wabash, he was made a major. He further distinguished himself in the Black Hawk and Seminole wars. In the Mexican War General Taylor was a great favorite with his men, who called him in admiration "Old Rough and Ready." Before 1848 he had taken very little interest in politics. He was nominated because of his record as a military hero. [14] Millard Fillmore was born in central New York in 1800, and at fourteen was apprenticed to a trade, but studied law at odd times, and practiced law at Buffalo. He served three terms in the state assembly, was four times elected to Congress, and was once the Whig candidate for governor. In 1848 he was nominated for the vice presidency as a strong Whig likely to carry New York.