Foster Brooks billed himself as 'The Lovable Lush'. I don't remember how he stumbled on to this act, but it is a variation of an old Vaudeville routine of 'The Immigrant' where someone new to the US mangles the language since they can't speak English as well as others.

But Brooks' drunk routine does not look like the behavior Perry had during the speech in question.

Perry just had a back operation. Perhaps the pain pill were kicking in? If so this would be a different matter than if he was soused.