The politics of Sudan formally took place within the framework of a federal representative democratic republic until April 2019, when President Omar al-Bashir's regime was overthrown in a military coup led by Vice President Ahmed Awad Ibn Auf. As an initial step he established the Transitional Military Council to manage the country's internal affairs. He also suspended the constitution and dissolved the bicameral parliament — the National Legislature, with its National Assembly (lower chamber) and the Council of States (upper chamber). Ibn Auf however, remained in office for only a single day and then resigned, with the leadership of the Transitional Military Council then being handed to Abdel Fattah al-Burhan. On 4 August 2019, a new Constitutional Declaration was signed between the representatives of the Transitional Military Council and the Forces of Freedom and Change, and on 21 August 2019 the Transitional Military Council was officially replaced as head of state by an 11-member Sovereignty Council, and as head of government by a civilian Prime Minister.