At least that is what Clive Crook writes in FT.
Alan Abramowitz, a politics scholar at Emory University, has shown that summer head-to-head polls convey almost no information about the forthcoming election. (Subsequent head-to-head polls are not much better.) Instead, he has a simple “electoral barometer” that weighs together the approval rating of the incumbent president, the economy’s economic growth rate and whether the president’s party has controlled the White House for two terms (the “time for a change” factor). This laughably simple metric has correctly forecast the winner of the popular vote in 14 out of 15 postwar presidential elections.
... The barometer not only picks winners but pretty accurately points to winning margins, too. In 1980, Jimmy Carter had the biggest postwar negative reading (–66); Ronald Reagan beat him by nearly 10 percentage points.
President George W. Bush’s net approval rating (favourable minus unfavourable) is currently –40; the economy grew at a 1 per cent annual rate in the first quarter; and Republicans have had two terms in the White House. Plugging the numbers into Mr Abramowitz’s formula gives the Republican candidate a score of –60, about as bad as it gets: second only to Mr Carter’s in the annals of doomed postwar candidacies. The barometer says Mr Obama is going to waltz to victory.
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