According to KTLA News, Los Angeles Urban Policy Roundtable President Earl Ofari Hutchinson is calling the depiction politically mean-spirited and dangerous. Hutchinson is challenging the group to come forward.

American Thinker claims the posters 'are spreading across' the city and has a photo of one on a freeway onramp.

Says the site: 'It is starting. Open mockery of Barack Obama, as disillusionment sets in with the man, his policies, and the phony image of a race-healing, brilliant, scholarly, middle-of-the-roader.'

Bloggers found that first reports of the poster in LA surfaced in April -- so it's unclear why it became such a web sensation today, the Times said.