The CDU campaign was based on the experience and reputation of Kohl. One of the CDU's main slogans was 'Safety, not Risks.' "Kohl exploited his familiarity and experience, as well as his status as Europe's longest serving head of government." The SPD on the other hand ran the campaign using strategies developed in the United States and the United Kingdom. The SPD set up election headquarters and introduced 'rapid rebuttal units' not unlike those used by Bill Clinton in his successful presidential bid in 1992. The SPD avoided direct attacks at Kohl but rather focused on their message of a "new center".