Kyiv, Ukraine (CNN) — One of Ukraine’s most influential political operators and a close aide of President Volodymyr Zelensky has resigned, hours after anti-corruption agencies raided his home – a major crisis as Kyiv faces new pressure from the US to accept a peace deal to end the war with Russia.

Officially the chief of staff to the president, Andriy Yermak has often been seen as Ukraine’s second most powerful man. He has been leading the Ukrainian delegation during recent talks in Geneva with Washington.

Yermak’s resignation, which was announced by Zelensky on Friday, complicates Kyiv’s position going into crucial peace negotiations with the United States.

“I want no one to have any questions about Ukraine today. Therefore, today we have the following internal decisions. First, there

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