As a whole, the nation has a two-party system, with the main parties since the mid-19th century being Democratic Party and the Republican Party. However, some states and cities have been dominated by one of these parties for up to several decades. Generally, the Democratic Party dominates in urban metropolitan areas, while the Republican Party dominates in rural areas. Following the 2018 elections, the Republican Party continued to hold a majority of state legislatures and a majority of governorships. However the Democratic Party won a majority of seats in the House of Representatives, while the Republican Party increased its majority in the Senate, resulting in a split Congress at the time. However, the Democratic Party now controls the Presidency and the Senate as a consequence of Joe Biden's victory in the 2020 election and two victories in the 2021 Georgia special elections.