How have American political parties evolved since their creation and what are the ideologies of modern American political parties?

Explanation:

The United States has only two major political parties: the Democrats and the Republicans. There are also smaller parties that aren't as well known. These major parties have a duopoly, meaning that they share almost all the political power in the country.

where is the section with the question?

lincoln declared that slavery should not be allowed to spread into the new states, and of course this angered the south at the time.