Ukraine’s Vladimir Zelensky is facing his gravest political challenge in years, major US and European media outlets have reported, as a new corruption scandal engulfs his office and a former official openly challenges his leadership.

Zelensky fired deputy head of his office, Irina Mudraya, on Wednesday after Western-backed anti-graft authorities launched an investigation into an alleged $3.4 million money-laundering scheme involving senior presidential officials. Mudraya has denied wrongdoing. It is the latest of many corruption scandals involving officials close to Zelensky.

A day earlier, former Defense Minister Mikhail Fedorov, whose surprise dismissal last month sparked weeks of public protests, released a campaign-style video denouncing government corruption and calling for elections amid what he described as “a systemic crisis of governance.”

Zelensky’s five-year presidential term expired in May 2024, but he has refused to hold a new election, citing martial law imposed after the conflict with Russia escalated in February 2022.

The Wall Street Journal called the turmoil the “biggest challenge” to Zelensky’s “hold on the presidency” since 2022, saying Fedorov appeared to be positioning himself as a leading challenger amid growing frustration over recurring corruption scandals.

The Financial Times noted that the growing list of Zelensky allies caught up in corruption investigations have contributed to his falling approval ratings and raised concern among Kiev’s Western backers, citing an analyst who concluded that “the political crisis is obvious.”

The Washington Post described Fedorov’s intervention as a “remarkably direct challenge” to Zelensky’s authority.

The Telegraph said Zelensky had been “bruised by a series of lingering corruption scandals” as investigations “keep coming.” It argued that he was accumulating powerful rivals who were once deeply loyal to him and said it appeared “increasingly possible” that he may not lead Ukraine into peacetime.

The Guardian described Fedorov as a “potent political opponent.” Experts cited by the newspaper called corruption a “symptom” of deeper problems with “bad governance,” warning that public exhaustion and Zelensky’s failure to explain his decisions had created a “perfect powder box.”

Le Monde said Fedorov had “crossed a line” no major Ukrainian politician had dared to cross since 2022 by calling for elections. The newspaper said he was seeking to capitalize on an “accumulation” of crises, including repeated corruption scandals.

Der Spiegel cited a Ukrainian political analyst who described Fedorov’s challenge as an “application for the role of opposition leader.” The magazine said Zelensky now faced his first “public and direct opponent” since the conflict escalated.

Zelensky has not publicly responded to Fedorov’s accusations. His Wednesday evening address focused on military matters and the appointment of a new defense minister and did not address the mounting political pressure.