Bush's second term.
Democrats won control of both houses of Congress, which was the first time either party did so since the 1994 elections.
In the Senate, Democrats won a net gain of six seats to take a narrow majority in that chamber.
Democrats picked up 31 seats in the House of Representatives, and after the election Nancy Pelosi became the first female Speaker of the House.
In the gubernatorial elections, Democrats won a net gain of six seats.
Nationwide, Republicans failed to win any congressional or gubernatorial seat that was held by a Democrat going into the election.
Reasons for the Democratic Party takeover include the decline of the public image of George W.
Bush, the dissatisfaction of his administration's handling of both Hurricane Katrina and the War in Iraq, the beginning of the collapse of the United States housing bubble, Bush's legislative defeat regarding Social Security Privatization, the Republican-controlled Congress's unprecedented and unpopular involvement in the Terri Schiavo case and a series of scandals in 2006 involving Republican politicians.Read more