South Korea’s presidential campaign formally launched on November 26 with seven registered candidates. The main candidates today are ruling Saenuri party representative Park Geun-hye and progressive opposition Democratic Unity Party (DUP) representative Moon Jae-in. The election is likely to turn on the following factors: a unified support base, demography, and turnout. Here are some factors to watch as South Korea’s campaign reaches its climax with a national vote to be held today.