BRUSSELS, BELGIUM - NOVEMBER 25: French President Emmanuel Macron (R), Austrian Prime Minister Sebastian Kurz (L), European Council President Donald Tusk (2nd R) and EU Chief Brexit Negotiator Michel Barnier (2nd L) attend the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: Prime Minister of Malta Joseph Muscat (C), Prime Minister of Italy Giuseppe Conte (R) and Prime Minister of Czech Republic Andrej Babis (L) attend the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: Prime Minister of Czech Republic Andrej Babis (L) and President of the European Commission Jean-Claude Juncker (R) attend Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: French President Emmanuel Macron (C) and Greek Cypriot Leader Nikos Anastasiadis (L) attend the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: Prime Minister of Austria Sebastian Kurz (L) and EU Chief Brexit Negotiator Michel Barnier (R) attend the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: Prime Minister of Italy Giuseppe Conte (L) and European Council President Donald Tusk (R) attend the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: Prime Minister of Lithuania Dalia Grybauskaite attends the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: Prime Minister of Netherlands Mark Rutte attends the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: German Chancellor Angela Merkel (L) and President of the European Commission Jean-Claude Juncker (R) attend the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: Prime Minister of Portugal Antonio Costa attends the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: French President Emmanuel Macron (C) and Greek Cypriot Leader Nikos Anastasiadis (L) attend the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: British Prime Minister Theresa May (L) arrives to attend the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: German Chancellor Angela Merkel (L) and President of the European Commission Jean-Claude Juncker (R) attend the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: Prime Minister of Italy Giuseppe Conte (R) and EU Chief Brexit Negotiator Michel Barnier (L) attend the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: French President Emmanuel Macron (L) and Italian Prime Minister Giuseppe Conte (R) attend the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: Flags of European Union member states are seen during the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: Austrian Prime Minister Sebastian Kurz (R) attends the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: French President Emmanuel Macron (R), Austrian Prime Minister Sebastian Kurz (L), European Council President Donald Tusk (2nd R) and EU Chief Brexit Negotiator Michel Barnier (2nd L) attend the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: Greek Prime Minister Alexis Tsipras (C) attends the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: Austrian Prime Minister Sebastian Kurz (L), European Council President Donald Tusk (R) and EU Chief Brexit Negotiator Michel Barnier (C) attend the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )

BRUSSELS, BELGIUM - NOVEMBER 25: President of the European Commission Jean-Claude Juncker (L) and Austrian Prime Minister Sebastian Kurz (R) attend the European Union (EU) Leader Summit on Brexit in Brussels, Belgium on November 25, 2018. ( Dursun Aydemir - Anadolu Agency )