Articles, to my knowledge, have never claimed that she had a commercial pilot's license as was stated by the poster. They have claimed that she made her corporate jet available to the McCain campaign (which I do not doubt).
Since reading the comments here, I decided to do some research on that. I’ve found she has a private pilot’s license, not a commercial pilot’s license. The comment about a commercial license may just be a mistake of the OP. This may also have something to do with why she is not flying him around herself. If the flights are for campaign purposes, it is no longer private, and thus insurance and FAA regs change.