Alinsky rule #5:
“Ridicule is man’s most potent weapon. It is almost impossible to counteract ridicule. Also it infuriates the opposition, which then reacts to your advantage.”
http://www.daylife.com/photo/0atx4NdcCIbFV?q=obama
http://www.daylife.com/photo/09p31yd3tBbow?q=obama