Deputy Premier and Foreign Minister Antonio Tajani called for a calm response from Europe on Monday after the US Supreme Court struck down an important part of President Donald Trump's tariffs policy on Friday, prompting him to announce new global tariffs of 15% at the weekend under a separate mechanism.     Tajani said Sunday he had a long conversation with European Trade Commissioner Maros Sefcovic about the developments, adding that he would participate in a G7 international trade meeting on