ADC Overtakes PDP as Main Opposition Party in Nigeria’s Senate After Major Defections

By George Omagbemi Sylvester

The African Democratic Congress (ADC) has overtaken the Peoples Democratic Party (PDP) as the leading opposition party in the Senate, following a wave of high‑profile defections that reshaped the chamber’s political landscape.

On Friday, March 13, 2026, multiple senators formally defected to the ADC during plenary, including former Sokoto State Governor and ex‑Speaker Senator Aminu Tambuwal (Sokoto South), Senator Victor Umeh (Anambra Central), Senator Tony Nwoye (Anambra North), Senator Lawal Adamu Usman (Kaduna Central), Senator Mohammed Ogoshi Onawo (Nasarawa South), Senator Augustine Akobundu (Abia Central), Senator Ireti Kingibe (FCT) and Senator Binos Yaroe (Adamawa South). Their departure from other parties, especially the PDP, dramatically altered the balance of power within the upper chamber.

With nine sitting senators now aligned with the ADC (surpassing the PDP’s seven senators) the African Democratic Congress has become the main opposition bloc in the Senate. Many defectors cited internal divisions, leadership crises and unresolved disputes within their former parties as motivating factors for their moves.

The defections underscore deepening realignments within Nigeria’s political opposition ahead of the 2027 general elections, as lawmakers and political figures seek platforms perceived to offer greater unity and electoral viability. ADC’s newfound status as the leading opposition caucus in the Senate (albeit still smaller than the ruling All Progressives Congress (APC) majority) reflects ongoing shifts in party loyalty and strategic positioning among Nigeria’s political elite.