http://www.politicalcartoons.com/cartoon/3605bba3-48bd-4d32-8e3a-2e2be11f9ce9.html
Visual rhetoric is the fairly recent development of a theoretical framework describing how visual images communicate, as opposed to aural or verbal messages.
The donkey is the symbol of Democrats and the elephant is the symbol for Republicans. Therefore; the Republican is expressing that they are better.
