In response to calls from various sectors of the Bolivian population for the formation of a unity bloc to defeat the
Movimiento al Socialismo in the 2025 elections, various candidates and opposition parties formed different alliances. On 18 December 2024,
Carlos Mesa announced the formation of the political alliance called "
Bloque de Unidad " signed with
Samuel Doria Medina, political leader of
Unidad Nacional,
Jorge Quiroga who had announced his official candidacy and his alliance with the
Frente Revolucionario de Izquierda and
Luis Fernando Camacho, leader of
Creemos to present a united front for the general elections. After that, members of "
Unidad es Posible" such as Vicente Cuellar,
Juan Del Grando, Amparo Ballivián and Carlos Börth would join the latter bloc. In January 2025, Carlos Börth withdrew his candidacy to support Jorge Quiroga and Samuel Doria Medina. Likewise, Carlos Mesa did the same, but maintained his support for the unity bloc, and was later assigned as spokesperson for the opposition alliance. On 8 March 2025, Vicente Cuellar withdrew as a pre-candidate and offered his support to Samuel Medina. On 11 March 2025, Carlos Börth announced his support for Samuel Medina.
Branko Marinkovic, who led another bloc called the "
Liberal Bloc ", would withdraw his candidacy announcing his support for Jorge Quiroga, but without entering this unity bloc. Days after the poll by the "Unity Bloc" was announced, Luis Fernando Camacho declined his nomination, leaving Tuto Quiroga, Samuel Doria Medina and Amparo Ballivián as candidates. After two strong factions emerged within this bloc, one supporting Samuel Medina and the other Jorge Quiroga, a series of disputes began within the bloc due to the lack of internal consensus to carry out a series of surveys to define the sole candidate, so Jorge Quiroga finally announced the registration of his
Libre alliance independently, moving away from the opposition unity, later Carlos Mesa announced his resignation as spokesman for this union. On 9 April 2025, Samuel Doria Medina was designated as the candidate of the Unity bloc. Later, on 18 April 2025, this alliance would be officially registered with the
Plurinational Electoral Organ under the name "
Unity".
Pre-candidates == Election results ==