11. James K. Polk (1845-1849)

Party: Democrat

Vice President – George M. Dallas


  • Expansionism and Manifest Destiny
  • Wilmot Proviso of 1846 would have forbid slavery in newly acquired territories but was defeated by southern senators


  • Mexican War 1846-1848
  • Treaty of Guadalupe Hidalgo brings an end to the Mexican War [February 2, 1848]
  • America assumed outstanding claims of American citizens
  • End to all Mexican claims for Texas
  • Mexican Cession of 1848 gives America the Rio Grande as a southern border with Mexico and the following territories:
  • California, Utah, Nevada, Arizona, Wyoming, parts of New Mexico (500,000 square miles for $15 million)
  • Oregon Territory settled with Great Britain in 1846
  • New Granada Pact and Polk Corollary to Monroe Doctrine 1848
Tags: Democrat, War