During last night’s debate, Rick Perry’s campaign sent out an email to the press making this incredible claim: “Gov. Perry never said that Social Security was unconstitutional.”

Benjy Sarlin walks us through Perry’s rapid evolution from declaring Social Security unconstitutional to pretending he never said such a thing.

Our photographer Jeff Malet reminds me that Gary Johnson’s best laugh line from last night’s debate made it into our slideshow of the Top Ten Protest Signs of 2009.