The Republicans have won control of the Senate in America's midterm elections and expanded their majority in the House of Representatives.
The final tallies remain unclear with some counts ongoing but the Republicans have won at least seven seats in the Senate - more than enough to gain control of America's upper house.
Republicans took Senate seats from Democrats in states where it was thought Obama's party had some hope of victory such as Colorado, North Carolina, Iowa and Arkansas.
Voters in the elections were also choosing candidates for seats in the House of Representatives and state-wide offices including governorships.
In the House of Representatives, Republicans built on their majority of 233 seats out of the 435 to 243 so far. If current projections are correct they will win their largest majority in the House since 1928, when the party had 246 seats.