57% believe newt gingrich checks that box off. and as mitt romney tries to win over that base of voters, he is going after gingrich, questioning his conservative credentials. in an interview with the "washington post," the former massachusetts governor said he's been an extraordinarily unreliable leader in the conservative world. not 16 or 17 years ago, but in the last two to three years and during the campaign. the number of times he's moved from one spot to another has been remarkable. i think he's shown a level of unreliability as a conservative today. >> and the problem with that argument coming from mitt romney. jon huntsman can make that argument, michele bachmann can make that argument, ron paul can make that argument. the problem that mitt romney has when he makes that argument is that when he says something like that, a newspaper digs up a quote yesterday from 2002 this decade where he bragged about being a progressive.