Washington/Moscow, May 27 -- US President Donald Trump said Vladimir Putin had "gone absolutely crazy" by unleashing the largest aerial attack of the war on Ukraine and said he was weighing new sanctions on Moscow, though he also scolded Ukrainian President Volodymyr Zelensky. "Something has happened to him (Putin). He has gone absolutely CRAZY!" Trump said of the Russian president on Truth Social. "I've always said that he wants ALL of Ukraine, not just a piece of it, and maybe that's proving to be right, but if he does, it will lead to the downfall of Russia!" Trump also criticised Zelensky, posting that the Ukrainian leader "is doing his Country no favours by talking the way he does. Everything out of his mouth causes problems, I don't l...