It Depends Which Side You're On

An interesting story in the NYTimes about the issue of John McCain's birth outside the continental United States, McCain’s Canal Zone Birth Prompts Queries About Whether That Rules Him Out.

Of course, the issue it raises is whether it could disqualify him from the presidency because he's not a "natural born citizen," as the constitution requires. Why do I think that the issue would be looked at differently if the candidate were a Democrat?