President Donald Trump on Monday demanded that US allies help secure the Strait of Hormuz, but European powers pushed back on a possible mission to reopen the vital waterway shut by Iran in response to US-Israeli attacks. Trump criticised the lukewarm response to his call for world powers to send warships to escort tankers through the strait, which normally carries a fifth of global crude oil, demanding a more enthusiastic response. Global oil prices have surged by 40 to 50 percent as Iran attacks shipping in the Strait of Hormuz and launches waves of missile and drone strikes in the Gulf in retaliation for the war launched by the United States and Israel on February 28.