Back in the 1980s when I was in college in DC, great caricature posters of President Reagan and his cabinet would appear around town glued up overnight. Robbie Conal was the artist and here's a profile of what he's doing now -- but DC needs him back! There are still plenty of politicians who need caricaturing in town.
See "Robbie Conal and the Art of Character Assassination: Guerrilla pop," By Dwayne Booth, LA Weekly October 21, 2008.
Boy, I'm sorry I never got any of those posters peeled off although I'm not sure I need to see Ed Meese ever again, even in a caricature.