The main presidential aspirants of the opposition NPP suspect elements outside the party are behind the smear campaign in the media in a deliberate attempt to knock their heads together.The campaign by the camps of the two main contenders Nana Akufo-Addo and Alan Kyerematen has been punctuated with text messages seeking to discredit one candidate or the other.There have also been damaging newspaper publications purported to be being spawn by either the Nana Addo or the Alan Kyerematen camp.But speaking on the Super Morning Show on Thursday, spokespersons for the camps said the smear campaign must be coming from people with the ultimate aim of knocking heads together in the party.Mr Boakye Agyarko who, who spoke for Nana Addo, earlier told host of the programme, Kojo Oppong-Nkrumah, people who have no message to sell to win votes are most likely to engage in such negative publications.“Those who don’t have any cogent and substantive message to convince and audience must say something and when they are bereft of any substance to communicate to their audience, they descend to the bottom of the barrel and this happens,” he said.According to him, political campaigning must be aimed at selling candidates as brands but not to engage in a deliberate attempt to run an opponent chewy.“Essence of competition is not to land fatal blow on anybody although they are competing,” he said.Throw awayMr Yaw Boabeng Asamoah, spokesperson for Mr Kyerematen said members of the party should disregard such messages so the “mischief makers” behind them to get their way.“Anybody willing to compete must do so on clear ground rules,” he said.Meanwhile, the managing editor of the Enquirer newspaper, Raymond Archer, says he has no hand in the publishing of false information to pitch Nana Akufo-Addo against Alan Kyerematen.Story by Fiifi Koomson/Myjoyonline.com/Ghana