Conversation so far:
What political party is O'Reilly affiliated with?
CANNOTANSWER.
When did O'Reilly start his career as a political commentator?
CANNOTANSWER.
What stations did he work for?
Fox News.
What year did he work for Fox News?
dating back to 2002.

Question: Is he still with Fox News?
Self-contained rewrite: Is Bill O'Reilly still with Fox News?