In June 2016, the United Kingdom (UK) voted by a narrow margin in favor of leaving the European Union (EU). Then home secretary Theresa May became prime minister and took on the onerous task of putting together a divorce deal. Brexit was set in motion when the UK formally triggered Article 50 of the Lisbon Treaty on March 29, 2017, to leave the EU and begin negotiations with Brussels. On November 14, 2018, EU and UK negotiators reached a draft withdrawal agreement and outlined a draft political declaration on the future UK-EU relationship once the Brexit transition period ends. EU leaders endorsed that withdrawal agreement on November 25 but the UK Parliament rejected it in January 2019. Since then, the political situation surrounding the exit deal has been unclear and in flux.