This sat for months unnoticed at the NPR website. When someone finally did notice it, all hell broke loose. Nice to see the NPR ombudsman has an issue with it.  Tim Graham of the Media Resarch Center hit the nail on the head:

"The cartoon is a perfect caricature of what NPR looks like to conservatives: liberals snidely imagining conservatives to be monosyllabic clods who can't make an argument beyond name-calling," said Tim Graham, director of media analysis for the conservative Media Research Center. "Conservatism is 'satirized' into a form of political retardation."

You will note NPR isn't taking it down...