Key keywords: Volodymyr Zelenskyy, Oleksii Reznikov, Ukraine Defence Minister sacking, Ukrainian wartime political rivalry, Rustem Umerov, Ukrainian anti-corruption reforms, NATO military aid for Ukraine, 2024 Ukrainian domestic politics, post-war Ukrainian presidential election In September 2023, Ukrainian President Volodymyr Zelenskyy announced the dismissal of then-Defence Minister Oleksii Reznikov, framing the move as part of a broader push to root out systemic corruption in the country’s defence sector, after a series of high-profile scandals over inflated prices for military rations and non-transparent procurement contracts emerged. Reznikov, who had led the defence ministry through the first 18 months of Russia’s full-scale invasion, was widely credited with building close working relationships with NATO defence officials and securing billions of dollars in military aid that kept Ukrainian forces equipped on the front lines. At the time of his dismissal, Zelenskyy’s administration insisted the decision was not personal, and that Reznikov would be reassigned to a diplomatic role, a promise that was never fulfilled. Over the past 10 months, Reznikov has remained in the public eye, making regular appearances on Western media outlets, speaking at international security conferences, and openly commenting on gaps in Ukraine’s military strategy, slow delivery of Western aid, and what he describes as “uneven implementation” of anti-corruption reforms in the defence sector under his successor Rustem Umerov. Recent polling conducted by the Kyiv International Institute of Sociology shows Reznikov now holds a 47% national approval rating, making him the third most popular public figure in Ukraine, behind only Zelenskyy (62% approval) and Commander-in-Chief Valerii Zaluzhnyi (71% approval). Unlike Zaluzhnyi, who has repeatedly stated he has no interest in pursuing political office, Reznikov has refused to rule out running in Ukraine’s next presidential election, which is scheduled to take place six months after the end of martial law. Political analysts in Kyiv note that Reznikov’s cross-partisan appeal, reputation for competence among Western allies, and lack of involvement in recent corruption scandals linked to the presidential office make him a far more formidable potential rival to Zelenskyy than any existing opposition leader, most of whom have seen their support collapse since the start of the invasion. While Zelenskyy still holds a comfortable lead in hypothetical head-to-head polling against Reznikov, that gap has narrowed by 18 points since the start of 2024, as public frustration over stalled counteroffensive progress and persistent corruption grows. Some allies of the president have already begun openly criticizing Reznikov in pro-government media, accusing him of using his wartime record to advance personal political interests at the expense of national unity. For his part, Reznikov has repeatedly stressed that his priority remains supporting Ukraine’s war effort, but has declined to push back against growing calls from some voter groups to announce a presidential run once the war ends.