Are we are about to witness one of the biggest political U-turns in recent years? Rumours are rife in Washington that Bush is about to undertake an astonishing U-turn on global warming.

Apparently after years of trying to sabotage agreements to tackle climate change, the Toxic Texan is drawing up plans to control emissions of carbon dioxide and rapidly boost the use of renewable energy sources.

Bush’s rethink follows increasing pressure on the White House from Republican governors such as Arnold Schwarzenegger, the mayors of more than 300 cities, business leaders and Congress. Let’s wait and see – but can a leopard really change its spots?