Shinzo Abe, Japan's prime minister, left, Donald Tusk, president of the European Union (EU), center, and Jean-Claude Juncker, president of the European Commission, pose for photographs ahead of a meeting at the European Council in Brussels, Belgium, on Tuesday, March 21, 2017. The European Union signaled its intention to keep U.K. prime minister Theresa May waiting before engaging in negotiations over the U.K.s exit from the bloc, in an early indication of how the British prime minister will see leverage slipping away as soon as she files for divorce. Photographer: Jasper Juinen/Bloomberg via Getty Images