Probably along these lines:

Trump: “I am not a war-mongering bag of piss-soaked cheeseburgers and shit, close to death, starting Armageddon because some Christian fundamentalists and my Israeli boss both say I should…”

Starmer: “Oh yes you are!”

Audience (in gas masks): “Yeah, you’re right, he is”

No further call and response.

Panto ends.