John Gibson will be watching Live Earth very carefully indeed on Saturday, with a stopwatch and a notepad, waiting to see any evidence at all of political airtime being given to Al Gore and a presidential campaign.
Gibson, it's fair to say, would feel vindicated by the headline in the latest Spectator:
That would seem to be a bit of a cynical misuse of what is meant to be a politically neutral campaign, using all these people's goodwill and time, which they believed to be being put towards a green future, as a launchpad for a run at the White House.
But hold on - James Forsyth's article under the eye-popping headline actually says the complete opposite:
But political insiders don’t think he will. They point out that even now Gore only comes in third in the Democratic field, trailing both Obama and his long-time rival Hillary Clinton. Larry Sabato, professor of political science at the University of Virginia and the pre-eminent poll-watcher in America, points out that still almost half of voters would not vote for Gore in any circumstances. Most importantly if Gore shed his cloak of celebrity and became a politician again, the normal rules would once more apply. He would be savaged for not practising what he preached. His earnestness would once again be the favourite butt of late-night comedians’ jokes.
So, erm, if he's not running, how can he be launching a campaign?