He is being fed pre-written questions. We all know the optics about only answering questions that you know the answer to. PDJT should do a parody skit based on pre-connived questions, ridiculing Hiden for his complicity.
PDJT should offer Biden the little bell to ring (from the nursing home patient in Breaking Bad....)
ABCDEF ring yes or no
GHIJKL ring yes or no.....
https://www.youtube.com/watch?v=pWso-qRaIlM
;-)
Or you can just do it the Hillary way and answer a question they didn't ask.