I think I know the answer to this question from The Guardian: "Could the backing of Barack Obama by the mayor of New York City Michael Bloomberg be "the most important news story of all time"?"

If Sandy doesn't destroy Obama's climate cowardice, what will? | Damian Carrington | Environment | guardian.co.uk

Could the backing of Barack Obama by the mayor of New York City Michael Bloomberg be "[Duncan Clark] the most important news story of all time"?