In 2023, the
Rally for Democracy and Development (RDD), Movement of Republicans (MR), and the People's Party (PAPE) formed a united opposition, the Alliance for Democratic Alternation in 2026 (2AD2026). RDD was the political party of
Joachim Yhombi-Opango, who served as president from 1977 to 1979.
Lassy Mbouity, the leader of Les Socialistes Congolais, declared his candidacy for the election. However, he was kidnapped on 11 May 2025. Nguesso's son
Denis-Christel Sassou Nguesso was elected to the
National Assembly. It was believed that Nguesso is grooming his son to succeed him. However, in December 2025, the ruling
Congolese Party of Labour nominated the elder Nguesso as its presidential candidate following a three-day congress. He subsequently confirmed his candidacy on 5 February 2026. The opposition
Pan-African Union for Social Democracy said it would not field a candidate in the election. On 20 February 2026, the Constitutional Court validated seven candidates for the election;
Denis Sassou Nguesso (
Congolese Party of Labour), Nganguia Engambé Anguios (independent), Joseph Kignoumbi Kia Mboungou (La Chaine), Mafoula Uphrem Dave (independent), Mavoungou Zinga Mabio (Alliance), Manangou Vivien Romain (independent) and Gavet Elengo Melaine Destin (Republican Movement). ==Campaign==