The latest news and top stories on Republican Party. A prominent United States-based political party, the Republican Party, also known as the GOP, is headquartered in Washington DC. Founded in 1854 to combat the expansion of slavery, its primary mission has evolved to advocate for conservative principles. Key areas of focus include promoting reduced taxes, limited government, free markets and a strong national defence. The party is significant for its historical role in abolishing slavery under Abraham Lincoln and its continued influence in American politics, currently holding the presidency and majorities in Congress.