The evasion of the slavery issue by Whigs and Democrats in 1848
Led to the formation of the new Free Soil antislavery party
The California gold rush
Made the issue of slavery in the Mexican Cession ares more urgent
The Underground railroad
Aroused southern demads for an effective fugitiv-slave law
The Free Soil Party
Was the predecessor of the antislavery Republican Party
The Compromise of 1850
Created a short lived national mood of optimism and reconciliation
The Fugitive Slave Law
Aroused active northern resistance to legal enforcement and prompted attemps at nullification in Massachusetts
The Pierce administration's schemes to aquire Cuba
Fell apart after the leaking of the Ostend Manifesto
The Gadsden Purchase
Heightened competition between southern and northern railroad promoters over the choice of a transcontinental route
Stephen Douglas's indefference to slavery and desire for a nothern railroad route
Led to the passage of the Kansas-Nebraska Act, without regard for the consequences
The Kansas-Nebraska Act
Cause a tremendous northern protest and the birth of the republican party
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