In the 18th century the Federalists and the Anti-Federalists were established which would form the basis of the Democrats and the Republicans. The Federalists believed in centralised government and are what is known today as the Republicans. The Anti-Federalists (otherwise known as the ‘Democratic-Republicans) believed in decentralised government and are what is known today as the Democrats. In 1828, Andrew Jackson (who was the president from 1829-37) renamed the ‘Democratic Republicans’ the Democrat Party and began to establish a liberal ideology which believed in protecting the interest of the poor.
By the 1860s, Slavery was a big issue on the agenda. Southern Democrats, in contrast to today, preached the economic virtues of slavery whilst Lincoln’s Republican Party, in the North, opposed it, and as a result won the civil war (1861-1865). This created an era of Republican domination in America.