In a new interview with GZERO World host Ian Bremmer, one of Europe's most accomplished diplomats expressed cautious optimism about the future of the European Union's relationship with the US. Wolfgang Ischinger served as Germany's ambassador to the US and UK, and is currently Chairman of the Munich Security Conference. His new book, World in Danger: Germany and Europe in an Uncertain Time, explores the current state of the EU and its place in global affairs as the UK prepares for a "BREXIT" and China looms large in the geopolitical landscape. In this portion of the conversation, Ischinger describes the crisis of trust created by President Trump's approach to transatlantic partners, and warns European leaders that it will take work on both sides of the ocean to restore full multilateral cooperation.

His conversation with Ian Bremmer was part of the latest episode of GZERO World, which begins airing nationally in the US on public television Friday, December 18th. Check local listings.