for more on you will the impact the ads may have had on voters, we go to ainsley erhard who was on then south carolina all day today. ainsley. >> sean, we are in my home state of south carolina on the eve of the primary. this is the city of charleston. hosting the southern republican leadership conference. it's a very important state for these candidates because historically speaking the candidate who wins here goes on to win the gop nomination. now the candidates and the super-pacs combined in this state have spent more than $8 million on television ad since december, accounting for more than 60% of ads sales. do they really work, though? we went to ask the voters. >> i don't pay that much attention to them. they must find that is does help. >> is there one in particular that resonates with you? >> no, there really isn't. >> you watch this and we are going to get your reaction. >> okay. >> mitt romney will do and say anything to become president. anything. maybe that explains all his flip-flops. >> i don't know how to respond to some of it because his position may change tomorrow. >>