European Commission President Ursula von der Leyen, European Council President Charles Michel, German Chancellor Angela Merkel, French President Emmanuel Macron and Chinese President Xi Jinping are seen on a screen during a video conference, in Brussels, Belgium December 30, 2020. REUTERS/Johanna Geron/Pool
Ursula von der Leyen, Charles Michel, Angela Merkel, Emmanuel Macron and Xi Jinping are seen on screen during the video conference. Reuters

Why a post-Brexit EU will be tougher to deal with