Milan, Feb. 28 (LaPresse) – ‘It is a moment of great tension, so we need to keep our nerves strong, react very calmly and see what will be the evolution after this conversation, which certainly did not go well’. Vice-Premier and Foreign Minister Antonio Tajani told ‘Zapping’ on Radio Uno, commenting on the clash at the White House between US President Donald Trump and his Ukrainian counterpart Volodymyr Zelensky. ‘Let's see how the situation develops, also of the eventual negotiation that there will have to be between the United States, Russia and Ukraine, which must necessarily be part of the negotiation,’ Tajani added, ’we are at a very delicate stage, we must always be very cautious. I believe that Europe must speak with one voice'.