Fact and fiction  The National Enquirer doesn't follow the rules
of traditional news organisations. Is it still a credible news
source?  So what are we to do with the National Enquirer? The
sensational tabloid was proven right this summer when former
Democratic presidential candidate John Edwards was pushed, at
long last, into admitting he'd had an extramarital affair.  It
was a story the Enquirer had broken last October. And if the
mainstream media had jumped in and verified it when Edwards's
candidacy was still viable, it might have changed the outcome of
the battle between Barack Obama and Hillary Clinton.  Now the
Enquirer is engaged in a full-bore assault on Sarah Palin and
her family, based entirely on anonymous sources.  Part one was
an article alleging that John McCain's running mate had had an
affair with a former business associate of her husband's - or,
to be more precise, that some members of her fractious extended
family believe she'd had an affair. (No doubt the lawyers helped
with the wording o