The document compares the major modern US political parties, the Democrats and Republicans, to the political parties of the early 19th century, the Democratic-Republicans and Federalists. The Democrats are the oldest continuously operating party with the most registered voters. The Republicans are often called the GOP and have the second most voters. The Democratic-Republican party was created by Jefferson and Madison and dominated from 1800-1824, while the Federalist party led by Hamilton had John Adams as its only president.