This story has been getting headlines for weeks now, but I haven't chimed in, because I didn't think of it as a political issue. (Even though, somehow, it's being treated as one).
To me, it has always been a journalism issue. How in the world did this get published?
And now it's being treated as such. Rolling Stone is bringing in Columbia Journalism School to find out how and why this happened, and they vow to publish the results. That's the right way to handle it.
I suspect the answers won't be pretty for the writer and the editor.