A kind of campaign is a type of political strategy used to influence public opinion. The three crossword solutions for the term 'kind of campaign' are SMEAR (5 letters), mayoral (7 letters), and presidential (12 letters). A SMEAR campaign is a type of negative publicity that attempts to discredit an individual or group by spreading false information. A mayoral campaign is a type of election campaign in which a candidate runs for mayor of a city or town. A presidential campaign is a type of election campaign in which a candidate runs for president of a country.