Ukrainian-born Congresswoman Victoria Spartz has sent a letter to the Biden administration demanding an investigation into Ukrainian President Volodymyr Zelenskiy advisor Andriy Yermak, who is suspected of being an agent of the Russian GRU, the Kremlin’s offshore intelligence arm.“Today, I sent a letter to Joe Biden with a request to provide a briefing on the supervisory procedures that are carried out regarding the head of the Administration of President Zelensky Andriy Yermak,” the congresswoman said.“Based on a variety of intelligence, Yermak’s actions in Ukraine and his alleged dealings with Russia, Congress urgently needs this information to confirm or deny various...