Thomas Corwin, "On the Mexican War," speech to the United States Senate, February 11, 1847, Masterpieces of Eloquence: Famous Orations of Great World Leaders from Early Greece to the Present Time, edited by Mayo Williamson Hazeltine (New York: P.F. Collier & Son, 1905).

Charles Sumner, "On Slavery and the Mexican War," a speech delivered at a public meeting in the Tremont Temple, November 5, 1846, Charles Sumner, The Works of Charles Sumner (Boston: Lee & Shepherd, 1875), 333-351.

Speech of Mr. G.P. Marsh, of Vermont: On the Mexican War, delivered in the U.S. House of Representatives, February 10, 1848.

Resolutions of Massachusetts on Annexation of Texas, 1843 - 1845, State Documents on Federal Relations, edited by Herman Vandenburg Ames (1906), 38-40.

Resolution of Massachusetts Against the Mexican War and Slavery, April 26, 1847, State Documents on Federal Relations, edited by Herman Vandenburg Ames (1906), 49.