Final answer:
The Confederacy supported slavery and nullification of federal laws, while the Union supported high tariffs and the supremacy of federal laws. The Union also wanted to promote trade through low tariffs and abolish slavery.
Step-by-step explanation:
The items can be classified as follows:
- Supported Slavery: Confederacy
- Supported High Tariffs: Union
- Believed States should be able to nullify federal laws: Confederacy
- Upheld the supremacy of federal laws: Union
- Supported low tariffs as a way to promote trade: Union
- Wanted to abolish slavery: Union
In summary, the Confederacy supported slavery, believed states should be able to nullify federal laws, while the Union supported high tariffs, upheld the supremacy of federal laws, wanted to promote trade through low tariffs, and wanted to abolish slavery.