Page "American Civil War" Paragraph 15

The earlier political party structure failed to make accommodation among sectional differences.

Disagreements over slavery caused the Whig and " Know-Nothing " parties to collapse.

In 1860, the last national political party, the Democratic Party, split along sectional lines.

Anti-slavery Northerners mobilized in 1860 behind moderate Abraham Lincoln because he was most likely to carry the doubtful western states.