Former White House chief of staff Mick Mulvaney believes Ukrainian President Volodymyr Zelensky has given up on seeking US support in the war against Russia. "Zelensky has probably made the alternative determination that Trump is not going to be that helpful to him moving forward,” Mr Mulvaney told News24. “I think Zelenskyy is probably at the end of his rope and finally decided he has to fight this war without Trump’s effusive support.”