"Earlier this week, a group of US Democrats placed a full-page advertisement in the New York Times urging Mr Gore to jump into the race for the White House. In an open letter, they told him "your country needs you now, as do your party, and the planet you are fighting so hard to save"."

It would certainly give the USA something it sorely needs: A credible candidate. All the mud that can be flung HAS been flung. I hope he agrees to do it.