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Former House Speaker Newt Gingrich scolds CNN moderator John King at the beginning of a Republican presidential candidates debate in Charleston

Former House Speaker Newt Gingrich scolds CNN moderator John King at the beginning of a Republican presidential candidates debate in Charleston, South Carolina, January 19, 2012. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS ELECTIONS)

Great debate moments

By Claudine Zap


The first debate between Republican presidential candidate Mitt Romney and President Barack Obama will be held on Wednesday. While the candidates prepare their talking points, we look back at some of the more memorable moments from past presidential face-offs. A zippy zinger can get serious airplay even after the actual debate is over, but so can an ill-timed gaffe. Here, some of the top moments.