ADVANCE FOR USE MONDAY, OCT. 22, 2012 AND THEREAFTER - FILE - In this Tuesday, Oct. 9, 2012 file photo, members of the Iowa Citizens for Community Improvement Action Fund dressed in Ses

 

              ADVANCE FOR USE MONDAY, OCT. 22, 2012 AND THEREAFTER - FILE - In this Tuesday, Oct. 9, 2012 file photo, members of the Iowa Citizens for Community Improvement Action Fund dressed in Ses
ADVANCE FOR USE MONDAY, OCT. 22, 2012 AND THEREAFTER - FILE - In this Tuesday, Oct. 9, 2012 file photo, members of the Iowa Citizens for Community Improvement Action Fund dressed in Sesame Street costumes hold a protest next to supporters of Republican presidential candidate, former Massachusetts Gov. Mitt Romney, outside a campaign stop for Romney in Van Meter, Iowa. In the sheer quantity of negative advertising and amount of dollars being spent, 2012 may mark the birth of an unprecedented era of negative campaigning, according to political scientists and campaign watchers. Contributing to the atmosphere is our extended campaign cycle of today, in which the barbs start flying long before the post-convention, fall campaign. (AP Photo/Charlie Neibergall)