An opposition political party .

In politics, the opposition comprises one or more political parties or other organized groups that are opposed, primarily ideologically, to the government (or, in American English, the administration), party or group in political control of a city, region, state, country or other political body.

An opposition political party holds different views than the government in power...

confederacy: supported slavery, believed states should be able to nullify federal laws, supported low tariffs

union: everything else

a plantation economy is an economy based on agricultural mass production, usually of a few commodity crops grown on large farms called plantations. plantation economies rely on the export of cash crops as a source of income.

i hope this : )