ADVANCE FOR USE MONDAY, OCT. 22, 2012 AND THEREAFTER - FILE - In this Thursday, Sept. 20, 2012 file photo, Lynn Armstrong Coffin and Eric Papalini hold puppets of Republican presidentia

 

              ADVANCE FOR USE MONDAY, OCT. 22, 2012 AND THEREAFTER - FILE - In this Thursday, Sept. 20, 2012 file photo, Lynn Armstrong Coffin and Eric Papalini hold puppets of Republican presidentia
ADVANCE FOR USE MONDAY, OCT. 22, 2012 AND THEREAFTER - FILE - In this Thursday, Sept. 20, 2012 file photo, Lynn Armstrong Coffin and Eric Papalini hold puppets of Republican presidential candidate and former Massachusetts governor Mitt Romney, left, and President Barack Obama with boxing gloves before a campaign rally in Sarasota, Fla. 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/Chris O'Meara)