After years of autocratic rule, South Korea adopted a political system in 1987 designed to prevent a return to authoritarianism. Frequent elections and term limits make it difficult for any party or individual to retain or wield power for long. The entire parliament faces election every four years, with 253 of the 300 members directly elected and the remaining 47 chosen by party representation. The president is limited to one five-year term and has no vice president. Although these rules have successfully prevented any individual from dominating the political system, they have also created a disruptive political environment with little reliability or continuity. At the moment, the divided opposition favors the conservative Saenuri Party, which has lackluster support but a good chance of maintaining a simple parliamentary majority.