Cal you focused on a ghost writer as part of your story. Pointing out how Obama alone did not write his book.  Yet as you fault Obama for this you forget the Donald takes credit for writing his books even when a number of "ghost writers" have been found.  
Meanwhile you fault Obama over his carrying a bible for political reasons.  Would that be true of the Trump's church attendance that seams to have begun during his campaign. It  does not seem to be happening  after the inauguration. Does as it interferes with his Sunday on the links.
Truth is politicians all play to their constituents with calculated decisions ranging from what church they will be seen at, what colleges they will speak at, and what policies they issue executive orders that bring praise by their followers.
Your story might have has some merit if you had simply focused on politicians using pretenses at all level rather than implying Obama alone is playing to his audience while apparently no other president has or does.