Weak, unworthy: Ukraine's Zelenskyy on Trump's decision to buy oil from Russia. Ukraine President Volodymyr Zelenskyy has called US President Donald Trump's decision to buy Russian oil "unworthy" and "weak". "Gifts to Putin will not bring peace or any benefit to the civilized world. Russia will 'repay' the diesel with further terror and perfidy," Zelenskyy said. Trump had sanctioned several nations, including India, for buying Russian oil.