After more than four years of negotiations, the deadline for Britain to strike a deal with the E.U. is Dec. 31, 2020. Read more: https://wapo.st/2Kr90zm. Subscribe to The Washington Post on YouTube: https://wapo.st/2QOdcqK Follow us: Twitter: https://twitter.com/washingtonpost Instagram: https://www.instagram.com/washingtonpost/ Facebook: https://www.facebook.com/washingtonpost/