A Los Angeles-area high school drama club made posters depicting President Bush with a Groucho Marx-style mustache and smoking a cigar. This was to promote their satirical play, The Complete History of America (Abridged). The principal made the club take down the posters after one student complained.
In the U.S., it's a national pastime to make fun of whoever's in power. Clinton got it good from Rush Limbaugh and many others, so now it's time for Bush to get his due. (I didn't vote for either of these gentlemen: I have voted for the Libertarian candidate in each election.)
If you can't enjoy the humor of those who probably are your political opposites, it's best to keep quiet. It just encourages them.