The president retains strong powers, such as authority to dissolve the National Assembly, declare a state of siege, delay legislation, conduct referendums, and appoint and dismiss the prime minister and cabinet members.
Soon after concluding that Gabon had an insufficient number of people for a two-party system, the two party leaders agreed on a single list of candidates.
This coalition appeared to work until February 1963, when the larger BDG forced the UDSG members to choose between a merger of the parties or resignation.
The UDSG cabinet ministers resigned, and M'Ba called an election for February 1964 and a reduced number of National Assembly deputies (from 67 to 47).
When the BDG appeared likely to win the election by default, the Gabonese military toppled M'Ba in a bloodless coup on February 18, 1964.
In March 1968, Bongo declared Gabon a one-party state by dissolving the BDG and establishing a new party—the Gabonese Democratic Party.
Using the PDG as a tool to submerge the regional and tribal rivalries that have divided Gabonese politics in the past, Bongo sought to forge a single national movement in support of the government's development policies.
Economic discontent and a desire for political liberalization provoked violent demonstrations and strikes by students and workers in early 1990.
The April conference approved sweeping political reforms, including the creation of a national senate, decentralization of the budgetary process, freedom of assembly and press, and cancellation of the exit visa requirement.
In an attempt to guide the political system's transformation into a multi-party democracy, Bongo resigned as PDG chairman and created a transitional government headed by a new Prime Minister, Casimir Oye-Mba.
The RSDG drafted a provisional constitution that provided a basic bill of rights and an independent judiciary but retained strong executive powers for the president.
Despite further anti-government demonstrations after the untimely death of an opposition leader, the first multi-party National Assembly elections in almost 30 years took place in September–October 1990, with the PDG garnering a large majority.
Serious civil disturbances, which were heavily repressed by the presidential guard, led to an agreement between the government and opposition factions to work toward a political settlement.
While Bongo's major opponents rejected the outcome as fraudulent, international observers characterized the result as representative even if the election suffered from serious administrative problems.
President Omar Ali Bongo narrowly beat rival Jean Ping in the official results of the presidential election in 2016.
President El Hadj Omar Bongo Ondimba, in power since 1967 and the longest-serving African head of state, was re-elected to another seven-year term according to poll results returned from elections held on November 27, 2005.
The president retains strong powers, such as authority to dissolve the National Assembly, declare a state of siege, delay legislation, conduct referendums, and appoint and dismiss the prime minister and cabinet members.