The People's Democratic Party (PDP) was a political party in Sudan during the immediate post-independence era. It emerged as a splinter faction of the larger Umma Party, which itself was the political wing of the Ansar Sufi order, founded by the descendants of Muhammad Ahmad al-Mahdi.
The PDP was established in the late 1940s and early 1950s, representing a more conservative and traditionalist wing of the Ansar, primarily led by Abdallah al-Mahdi and later by Imam al-Hadi al-Mahdi. This split from the main Umma Party, led by Sadiq al-Mahdi, significantly divided the Ansar movement politically.
Ideologically, the PDP was generally conservative, with strong ties to its religious base, advocating for Islamic principles within Sudanese governance. It often formed alliances with the National Unionist Party (NUP) in various coalition governments during the first and second parliamentary periods (1956-1958, 1964-1969). This alliance was often seen as a counter-balance to the Umma Party's influence.
The existence of the PDP and its rivalry with the main Umma Party contributed to political instability in Sudan's early years. However, following the military coup of Jaafar Nimeiry in 1969, which suppressed all political parties, the two factions of the Umma Party eventually reconciled and reunified under Sadiq al-Mahdi, effectively ending the PDP as a distinct entity.