Call me an old cynic if you like. But I don't think that Obama taking off 36 hours to see his ailing grandmother will be do his campaign any harm. Indeed, it will help it and already has done.
Think of what we have seen in the last 24 hours: The news cycle dominated by news that Obama is prepared to take time off to fly all the way to Hawaii to see his dear old grandmother (Trivia alert: This must surely be the first time a major US party presidential nominee has visited the proud state of Hawaii two weeks before the election).
Most of all, we have seen photos of Obama's grandmother flashed up on the media (causing, I would suspect, paroxysms of delight in the Obama campaign control tower).
So, the Bradley effect takes a bit of a bashing. The ratings go up for "shares our values" and any McCain shenanigans with Jeremiah "God damn America" Wright videos will now look like very bad form - very mean-minded.
Of course, I don't for a moment suggest that any of this is anything but coincidental, and it is very sad that Obama's grandmother is very ill. I just don't think any of Obama's campaign team will worry about their candidate going AWOL for 36 hours for that reason.