Supporters of US Democratic Party candidate Barack Obama rally on Westminster bridge in London on November 1 2008. The Economist, the widely-respected British weekly current affairs magazine, backed on October 30 Obama 'wholeheartedly' to become the next US president, describing him as a gamble America should take. Getty Images logo Getty Images 13 months ago

Supporters of US Democratic Party candidate Barack Obama rally on Westminster bridge in London on November 1 2008. The Economist, the widely-respected British weekly current affairs magazine, backed on October 30 Obama 'wholeheartedly' to become the next US president, describing him as a gamble America should take.