The Democrats have taken control of the Senate and the House of Representatives. These charts and maps reveal the key trends and races behind this result
The Republicans have lost seven Senators, 25 House districts and five governor races.
As of 8.00am Eastern Time (ET) on Wednesday, more than 1,800 of nearly 2,500 counties with Senate elections had returned more than 90% of their votes. Americans did not turn out in significant numbers for the Republicans amid high fuel prices and dissatisfaction with the president.
