Brexit, the United Kingdom’s withdrawal from the European Union (EU), which formally occurred on January 31, 2020. The term Brexit is a portmanteau coined as shorthand for British exit. In a referendum held on June 23, 2016, some 52 percent of those British voters who participated opted to leave the EU, setting the stage for the U.K. to become the first country ever to do so. The details of the separation were negotiated for more than two years following the submission of Britain’s formal request to leave in March 2017, and British Prime Minister Theresa May, whose legacy is inextricably