Polling has always been as much art as science, as David Cameron’s decisive victory in Britain’s general election reminds us. For months polls had shown a dead heat between the incumbent Prime Minister and his Labour Party challenger. Yet Mr. Cameron emerged Friday with the first Tory majority in Parliament since John Major was swept from office in 1997.
This is a political opportunity for Mr. Cameron, who was forced into an unwieldy coalition with the left-of-center Liberal Democrats when he came to office in 2010. This time Conservatives took 331 seats in the 650-seat parliament, a gain of 28. Labour lost 25 seats, and the Lib Dems were left politically for dead, losing all but eight of their previous 57 seats. The night’s only other winner was the Scottish National Party, which won 56 seats by routing Labour from its old northern strongholds.