4. "A house divided against itself cannot stand. . . . I do not expect the Union to be dissolved; I do not expect the house to fall; but I do expect it will cease to be divided. It will become all one thing, or all the other. . . .” -Abraham Lincoln, 1858 The “divided house” referred to in this speech was caused primarily by * a. expansionism
b. war with Mexico
c. slavery
d. the suffrage movement