One of the great things and least understood things about caricature is tgat you not only can caricature facial features, but also personality , body language and mannerisms. These are the essential qualities that make personalities recognizable to us. Warner Brothers artists and writers in the fifties did a masterful job demonstrating this in this Bugs Bunny cartoon, co staring the hilarious "Pete Puma"character, who was based on the live action comic character, "Crazy Guggenheim" from the Jackie Gleason Show.
I can't take the credit for finding out this info, the thanks goes to Google! What a great technological age we live in that we can find out even the most obscure bits of information just by typing in a request!
I've said it once, and I'll say it again...when drawing caricature "forget"about drawing the likeness! Draw the PERSONALITY and you'll GET te likeness!