The contradictory US president’s inclination is to side with those who want to break up the EU

Donald Trump’s Jekyll and Hyde performance on the opening leg of his European tour – one minute angrily wielding a wrecking ball and the next playing the oleaginous anglophile – will hardly leave European diplomats, especially those in Britain, reassured as they brace themselves for his bilateral summit with Vladimir Putin on Monday.
It is this meeting – the two men have met only two and a half times before according to Trump’s own arithmetic – that contains the most serious risk to the battered western alliance.
After Friday’s press conference with Theresa May in which he rowed back on some of the more incendiary remarks he made about Brexit in his interview with the Sun, British officials were reassured the US president can be chastened, if not cowed, when confronted by the damage he has wreaked. But they cannot know whether Trump, restored by two days on the Scottish links, will regain his bullish self confidence as the master deal-maker by the time he reaches the Russian president in Helsinki.
  Key moments from Trump and May's joint press conference – video