Kolingba suspended the constitution and ruled with a military junta until 1985. He introduced a new constitution in 1986 which was adopted by a nationwide referendum. Membership in his new party, the Rassemblement Démocratique Centrafricain (RDC), was voluntary. In 1987 and 1988, semi-free elections to parliament were held, but Kolingba's two major political opponents, Abel Goumba and Ange-Félix Patassé, were not allowed to participate.