For one thing , he has hired a new campaign team , including Greg Stevens , a media consultant and one-time chief of staff to former Governor Kean , whose handiwork has included an ad that is credited with sending Michael Dukakis 's 1988 presidential campaign into a tailspin -- the spot featured the former Massachusetts governor wearing an odd-looking tank helmet -- and whose firm created the swift boat ads that helped sink Senator John Kerry 's presidential campaign last year .