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.
How else was he involved in politics?
Lewis once stated political speeches should not be at the Oscars.

Question: What prompted him to take this stand?
Self-contained rewrite: What prompted Jerry Lewis to take a stand against political speeches at the Oscars?