Last Friday, Huntsman made headlines for calling a Mitt Romney a ‘well-lubricated weather vane.’ In Huntsman’s latest campaign video, he goes a step further, comparing Romney to a back-flipping toy monkey. The video questions Romney’s ‘core,’ an attack that David Plouffe repeated today on Meet the Press.

Huntsman was the candidate who promised a civil campaign, but has struggled to make an impression on Republican voters.