FILE - British Prime Minister Boris Johnson shakes hands with European Commission President Jean-Claude Juncker during a press point at EU headquarters in Brussels, Oct. 17, 2019. Outgoing U.K. Prime Minister Boris Johnson has been the bane of Brussels for many years, from his days stoking anti-European Union sentiment with exaggerated newspaper stories to his populist campaign leading Britain out of the bloc and reneging on the post-Brexit trade deal he himself signed. (AP Photo/Francisco Seco, file)