My thesaurus lists two synonyms for "caricature." The first synonym is "cartoon" and that certainly can fit the bill... but the second synonym is "misrepresentation," which fits MUCH CLOSER what is being done to Bush.
I believe that what Ramirez is depicting is the fact that the left has erected a CARICATURE, a misrepresentation of Bush by falsifying what he said in the now famous 16 words. It is that caricature that "Politics" is attempting to kill in this cartoon, not the real Bush and his very true statement.
This has to be the reason for the differing styles drawn by Ramirez... and it is profound. This is a very DEEP cartoon... and brilliant!
This cartoon is a political pun in cartoon form... to my mind the title of this work of are should be:
"Caricature Assassination!"