a fox news poll showed the donald trump endorsement might not be such a big help. 1/3 of voters said it would make them less likely to vote for a specific candidate. carl cameron life in our d.c. newsroom. first time we are seeing advertisement on tv in newt gingrich. >> it's amazing, shep, 29 days from the first votes in iowa, first caucus. this is the first time of this entire campaign that the top three candidates are actually all running tv ads simultaneously. decades since it's taken the air war this long to actually begin. gingrich started his first ad today entirely positive all about his agenda. mitt romney actually outspent and attacked everyone on the air in iowa last time. he just launched his first iowa ad too. no mention of any rivals. ron paul been on the ear of any other candidate in this election. he launched the first campaign ad in iowa with actual criticism of himself on other rivals. >> what's up with these sorry