" Canada's chief delegate said the pullout "undoubtedly makes the work being undertaken in Durban that much more difficult.

CENTERFORSECURITYPOLICY: Center For Security Policy

" Jesse Jackson, the chief delegate of the delegation from Jesse Jackson, said that the United States "should negotiate a change, not withdraw and run.

CENTERFORSECURITYPOLICY: Center For Security Policy

And Christie Whitman, the chief US delegate at Trieste, said the new administration in Washington needed time to assess its policy on global warming.

BBC: G8 progress on climate change

Before Tuesday, the Romney campaign made clear its chief aim was to widen Mr. Romney's delegate margin, even in states where he fell short of victory.

WSJ: On Super Tuesday, Romney Ekes Past Santorum in Ohio

His chief adviser, Gary South, hovering on the fringes of the convention under the baleful gaze of young Republican delegate-minders, promised that, whoever emerged as the Republican candidate, Mr Davis would be waiting to clobber him.

ECONOMIST: California's Republicans