Yes There is a difference:
A political campaign is an organised effort to influence the decision making process within society and government. Some examples of this would be the 'Right to Life' campaign or the "Campaign to Save Native Forests". An election campaign is a period before an election where the candidates and parties are saying and doing everything that they can to be elected. In democracies, political campaigns often influence election campaigns, where representatives are chosen to stand for parliament. Political campaigns also include organised efforts to alter policy within any institution, such as the campaign to prevent the establishment of a toxic waste dump in Mildura.