While I was listening to the NY Times political campaign developments, I run into this sentence that is a bit difficult to grasp? I might be making mistakes with the sentence because I just got it during the conversation. Thanks.
How much of it is the campaign staff?
We don't know what "it" is without context.
Was there a problem? A success?
Either way, whatever "it" is, the person is asking how much the campaign staff is responsible for it. How much of "it" was due to their actions, input, etc.