Conversation so far:
what did Chris Christie do on the trump campaign?
Trump named Christie to head up a transition team in the event of a Trump presidency.
what were his responsibiliites?
CANNOTANSWER.
what was his administration role?
Christie was being considered for a role in the Trump administration, but has said he will serve out his term as governor.

Question: did he do so?
Self-contained rewrite: did Chris Christie have a role in the Trump administration?