The People’s United Democratic Movement is the largest opposition party in Swaziland. It is a Socialist party. Formed in 1983 it is led by pro-democracy activist Mario Masuku. The Swaziland regime has been watching PUDEMO closely since it launched the Ulibambe Lingashoni (Don’t Let the Sun Set) campaign which is aimed at a total liberation of Swaziland and has recently clamped down heavily on even small manifestations of support for PUDEMO.