ADVANCE FOR USE MONDAY, OCT. 22, 2012 AND THEREAFTER - FILE - In this Thursday, Aug. 30, 2012 file photo, three-year-old Ava Simko of Harding, Pa., holds a sign criticizing Republican p

 

              ADVANCE FOR USE MONDAY, OCT. 22, 2012 AND THEREAFTER - FILE - In this Thursday, Aug. 30, 2012 file photo, three-year-old Ava Simko of Harding, Pa., holds a sign criticizing Republican p
ADVANCE FOR USE MONDAY, OCT. 22, 2012 AND THEREAFTER - FILE - In this Thursday, Aug. 30, 2012 file photo, three-year-old Ava Simko of Harding, Pa., holds a sign criticizing Republican presidential candidate Mitt Romney during a protest in downtown Scranton, Pa. 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/The Scranton Times-Tribune, Butch Comegys)