Republicans have won control of the US Senate and bolstered their majority in the House of Representatives as Americans delivered a stinging rebuke to Barack Obama in mid-term elections.
The US president now faces his final two years in office contending with a Congress fully controlled by a party that firmly opposes his policies.
While Democrats had been braced for a tough election night, their battering exceeded expectations.
Republicans picked up seven seats - giving them 52 seats in the 100-member Senate and the potential to win several more, while Democrats did not take a single Republican seat.
In the House, Republicans were on track to build their majority to record levels.
Democrats not only lost high-profile gubernatorial races in Florida and Wisconsin, they also lost in Democratic-leaning Massachusetts, Maryland and Illinois, Mr Obama's adopted home state.
Democrats could not even beat Republican Michael Grimm, a New York congressman indicted on tax fraud and other charges who gained national fame by threatening to throw a reporter off a balcony in Congress.
The vote gives Republicans momentum heading into the 2016 presidential race.
Republicans will be especially encouraged by their victories in battleground states that can sway presidential races, such as Florida, Ohio and Michigan.
The party had made Mr Obama's presidency the core issue, even though he was not on the ballot. They rallied supporters against a president they see as pushing the government too deeply into American lives. Republicans also tapped into a well of discouragement at a time many see the economy stagnating.