Conversation so far:
What were Lewis' political views?
"Don't get into anything political.
Don't do that because they will usurp your energy".
What did he do politically/?
Lewis was a supporter of the Civil Rights Movement.
What else did Lewis do?
Lewis came out against the Vietnam War, when his son, Gary, returned from service traumatized.

Question: How else was he involved in politics?
Self-contained rewrite: How else was Jerry Lewis involved in politics other than coming out against the Vietnam War?