So, Bush is scared to face questions by regular folks because some of them may come from "partisan" people. What does this tell us?
First, it reaffirms what we know - that his audiences and their questions are pre-screened.
Second, it reaffirms that Chicken George is indeed a chicken, frightened of the people he's supposed to govern.
And, finally, it tells us that Chicken George is scared the people will ask him tougher questions than the press corps will.