The only excuse being offered is that, since the 13 year old is so young, the Obamas want privacy for their children. The problem with that theory is that the Obamas have declared their children part of their reelection campaign and that, since taxpayers are funding the trip, this event of an exotic trip to Mexico is a matter of public record.
Anyway The Blaze noticed the disappearing stories:
Buzzfeed is now reporting that it is a “long tradition” not to report on presidential kids’ vacation plans, citing this as the possible reason for the many unexplained retractions.
If this is the case, it still raises questions as to why Malia was allowed to vacation in a country that the State Department recommends no American travels to.Here's a link to the first blog post we wrote about this; you'll notice that the Daily Mail linked story is now also down.
Neither AFP nor the White House responded to Buzzfeed’s request for comment.
UPDATE: A good breakdown here.