Present History begins with a graphic organizer that shows the important events that define expansion west throughout the 1840s. This presentation traces politics in the 1840s and the maturation of the two-party system. It shows the birth of the Whigs and includes a chart that lays out the evolution of the major parties in U.S. history. This presentation shows how territorial expansion and Manifest Destiny caused increased tensions between northerners and southerners. It includes Texas annexation, the Mexican War and the Mexican Cession, California and the Compromise of 1850, the Wilmot Proviso, and the birth of the Free Soil Party. It continues on to include the events of the 1850s that made compromise in 1860 much more improbable. It includes northern reaction to the Fugitive Slave Act, state personal liberty laws, the Kansas-Nebraska Act and the Lecompton Constitution, Bleeding Kansas, John Brown's Raid, Harriet Beecher Stowe's Uncle Tom's Cabin, the Dred Scott Decision, the financial crash of 1857, the Lincoln-Douglass debates, the rising sectionalism that characterized the elections of 1856 and 1860, and southern seccession. Although this is an AP US history presentation, it can easily be modified for all U.S. history courses. Be sure to check out "U.S. History Complete Set, Volume I" and "U.S. History Complete Set, Volume II" for all of Present History's U.S. history presentations.