New Jersey voters don't believe Jon Corzine's campaign is deliberately seeking to make a campaign issue out of Christopher Christie's weight, according to a Public Policy Polling (PPP) poll.  Nearly half of the state's likely voters, 47%, say Corzine has not tried to drive the weight issue, while 35% believe he has.  More than eight out of ten voters (81%) say Christie's weight is not a legitimate issue, while 11% say it is.  Among likely voters, 4% say Christie's weight makes them more likely to vote for him, 19% say less likely, and 78% say it makes no difference.  PPP is a Democratic polling firm based out of North Carolina.