 By Bogdan Kochubey KYIV Reuters - President Volodymyr Zelenskiy stripped four political figures of their Ukrainian citizenship on Tuesday, including pro-Kremlin politician Viktor Medvedchuk who was transferred to Russia last year in a prisoner swap deal. I have decided to terminate the citizenship of four persons: Andriy Leonidovych Derkach, Taras Romanovych Kozak, Renat Raveliyovych Kuzmin and Viktor Volodymyrovych Medvedchuk, Zelenskiy said in his nightly video address. If peoples deputi... 