Final answer:
The Republican Party in the 1860 election stood against the expansion of slavery into territories, representing a new political movement in the mid-1850s.
Explanation:
The party in the 1860 election that stood for no expansion of slavery into the territories was the Republicans. The Republicans emerged as a new party in the mid-1850s, made up of northern Whigs, antislavery Democrats, and Free Soil Party members, with a strong stance against the spread of slavery into new territories.
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