European confidence in an American “security guarantee” has hit a historic low, a survey suggests, with only one in 10 people across 15 countries seeing the US as an ally and majorities in all doubting it would come to their aid if they were attacked. The survey, published on Wednesday by the European Council on Foreign Relations (ECFR) thinktank before critical G7 and Nato summits in France and Turkey over the coming weeks, revealed “deep European distrust in the US”, the authors said. It also showed that, while many Europeans felt relations with Washington would improve once Donald Trump leaves...