Pictures of Michael Spavor, a Canadian businessman, and Michael Kovrig, a former Canadian diplomat, both detained in China since December 2018, are displayed on a video monitor as U.S. Secretary of State Mike Pompeo speaks during a news conference at the State Department in Washington, U.S., July 1, 2020. Manuel Balce Ceneta/Pool via REUTERS

Paramilitary Police officers cross a street in the diplomatic district near a nucleic acid testing site, after a new outbreak of the coronavirus disease (COVID-19) in Beijing, China, June 19, 2020. REUTERS/Thomas Peter

Paramilitary Police officers cross a street in the diplomatic district near a nucleic acid testing site, after a new outbreak of the coronavirus disease (COVID-19) in Beijing, China, June 19, 2020. REUTERS/Thomas Peter

Sven Kuehn von Burgsdorff, the European Union's representative to the West Bank and Gaza, speaks with Reuters about Israeli annexation during a diplomatic tour of Palestinian villages, near al-Mughayyir in the Israeli-occupied West Bank June 11, 2020. REUTERS/Rami Ayyub

NGO workers speak to European Union heads of mission and other local envoys about the impact of Israeli annexation, during a diplomatic tour of Palestinian villages, near al-Mughayyir in the Israeli-occupied West Bank June 11, 2020. REUTERS/Rami Ayyub

Diplomats stand in line to sign the condolences book following the death of Burundi's President Pierre Nkurunziza, at the State House in Bujumbura, Burundi June 10, 2020. REUTERS/Evrard Ngendakumana

Ambassador of the Federal Republic of Russia to Burundi Valery Mikhaylov signs the condolences book as other diplomats stand in line following the death of Burundi's President Pierre Nkurunziza, at the State House in Bujumbura, Burundi June 10, 2020. REUTERS/Evrard Ngendakumana

Sir Simon McDonald, the Permanent Under Secretary and Head of the Diplomatic Service at the Foreign and Commonwealth Office in Downing Street, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 4, 2020. REUTERS/John Sibley

Sir Simon McDonald, the Permanent Under Secretary and Head of the Diplomatic Service at the Foreign and Commonwealth Office in Downing Street, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 4, 2020. REUTERS/John Sibley

A view shows barriers in front of a monument to Russian diplomat and poet Alexander Griboyedov, after the city authorities announced a partial lockdown ordering residents to stay at home to prevent the spread of coronavirus disease (COVID-19), in Moscow, Russia March 30, 2020. REUTERS/Tatyana Makeyeva

German ambassador to Venezuela Daniel Kriener talks with other diplomats at Venezuela's National Assembly building in Caracas, Venezuela January 5, 2020. Picture taken January 5, 2020. REUTERS/Manaure Quintero

Dr. Chikwe Ihekweazu, the Director General of the Nigeria Centre for Disease Control (NCDC) has his temperature checked during a diplomatic meeting at the Ministry of Foreign Affairs in Abuja, Nigeria March 12, 2020. REUTERS/Afolabi Sotunde

Diplomats have their temperatures checked at the Ministry of Foreign Affairs complex in Abuja, Nigeria March 12, 2020. REUTERS/Afolabi Sotunde

A diplomat has his temperature checked at the Foreign Affairs office in Abuja, Nigeria March 12, 2020. REUTERS/Afolabi Sotunde

Nigerian Health Minister Osagie Ehanire briefs diplomats on the country's measures to tackle the coronavirus in Abuja, Nigeria March 12, 2020. REUTERS/Afolabi Sotunde

Nigerian Foreign Minister Geoffrey Onyeama briefs diplomats on the country's measures to tackle the coronavirus in Abuja, Nigeria March 12, 2020. REUTERS/Afolabi Sotunde

Nigerian Foreign Minister Geoffrey Onyeama briefs diplomats on the country's measures to tackle the coronavirus in Abuja, Nigeria March 12, 2020. REUTERS/Afolabi Sotunde

South Korean Foreign Minister Kang Kyung-wha, wearing a face mask, arrives at a briefing for foreign diplomats on the situation of the coronavirus disease (COVID-19) outbreak, at the foreign ministry in Seoul, South Korea March 6, 2020. Jung Yeon-je/Pool via REUTERS

U.S. Ambassador to South Korea Harry Harris (C) and other foreign diplomats, wearing face masks, attend a briefing by South Korean Foreign Minister Kang Kyung-wha (not pictured) on the situation of the coronavirus disease (COVID-19) outbreak, at the foreign ministry in Seoul, South Korea March 6, 2020. Jung Yeon-je/Pool via REUTERS

Foreign diplomats, wearing face masks, attend a briefing by South Korean Foreign Minister Kang Kyung-wha (not pictured) on the situation of the coronavirus disease (COVID-19) outbreak, at the foreign ministry in Seoul, South Korea March 6, 2020. Jung Yeon-je/Pool via REUTERS

Foreign diplomats, wearing face masks, attend a briefing by South Korean Foreign Minister Kang Kyung-wha (not pictured) on the situation of the coronavirus disease (COVID-19) outbreak, at the foreign ministry in Seoul, South Korea March 6, 2020. Jung Yeon-je/Pool via REUTERS

South Korean Foreign Minister Kang Kyung-wha speaks during a briefing for foreign diplomats on the situation of the coronavirus disease (COVID-19) outbreak, at the foreign ministry in Seoul, South Korea March 6, 2020. Jung Yeon-je/Pool via REUTERS

South Korean Foreign Minister Kang Kyung-wha speaks during a briefing for foreign diplomats on the situation of the coronavirus disease (COVID-19) outbreak, at the foreign ministry in Seoul, South Korea March 6, 2020. Jung Yeon-je/Pool via REUTERS

A Diplomatic Security agent looks on in the lobby as U.S. Secretary of State Mike Pompeo meets with with Chairperson of the African Union Commission Moussa Faki Mahamat at the African Union Headquarters in Addis Ababa, Ethiopia February 18, 2020. Andrew Caballero-Reynolds/Pool via REUTERS

Diplomatic Security agents stand guard next to a car as U.S. Secretary of State Mike Pompeo (not pictured) leaves his hotel for the Luanda International Airport in Luanda, Angola February 17, 2020. Andrew Caballero-Reynolds/Pool via REUTERS

Foreign diplomats are seen in boats as Indian security force personnel stand guard on the banks of Dal Lake in Srinagar February 12, 2020. REUTERS/Danish Ismail

Foreign diplomats are seen in a motorboat in Dal Lake in Srinagar February 12, 2020. REUTERS/Danish Ismail

A convoy of cars believed to be carrying foreign diplomats is seen after they arrived in Srinagar February 12, 2020. REUTERS/Danish Ismail

U.S. Secretary of State Mike Pompeo is escorted by Kristina Kvien, the top U.S. diplomat in Ukraine, upon his arrival in Kyiv, Ukraine, January 30, 2020. REUTERS/Kevin Lamarque/POOL

European Commission President Ursula von der Leyen caresses a French police officer's horse in front of the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Commission President Ursula von der Leyen caresses a French police officer's horse in front of the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Commission President Ursula von der Leyen caresses a French police officer's horse in front of the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Commission President Ursula von der Leyen caresses a French police officer's horse in front of the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Commission President Ursula von der Leyen and European Parliament President David Sassoli react at the house of French political economist and diplomat Jean Monnet, where they will attend a post-Brexit preparation meeting in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Council President Charles Michel, European Commission President Ursula von der Leyen and European Parliament President David Sassoli attend a post-Brexit preparation meeting at the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Council President Charles Michel, European Commission President Ursula von der Leyen and European Parliament President David Sassoli attend a post-Brexit preparation meeting at the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Council President Charles Michel, European Commission President Ursula von der Leyen and European Parliament President David Sassoli greet each other at the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Commission President Ursula von der Leyen and European Parliament President David Sassoli stand at the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Council President Charles Michel, European Commission President Ursula von der Leyen and European Parliament President David Sassoli greet each other at the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Council President Charles Michel, European Commission President Ursula von der Leyen and European Parliament President David Sassoli gather at the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Commission President Ursula von der Leyen and European Parliament President David Sassoli stand at the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Council President Charles Michel, European Commission President Ursula von der Leyen and European Parliament President David Sassoli arrive at the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Council President Charles Michel, European Commission President Ursula von der Leyen and European Parliament President David Sassoli pose in front of the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Council President Charles Michel, European Commission President Ursula von der Leyen and European Parliament President David Sassoli pose in front of the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Council President Charles Michel, European Commission President Ursula von der Leyen and European Parliament President David Sassoli walk around the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Council President Charles Michel, European Commission President Ursula von der Leyen and European Parliament President David Sassoli walk around the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Council President Charles Michel, European Commission President Ursula von der Leyen and European Parliament President David Sassoli walk around the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Council President Charles Michel, European Commission President Ursula von der Leyen and European Parliament President David Sassoli walk around the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Council President Charles Michel, European Commission President Ursula von der Leyen and European Parliament President David Sassoli arrive at the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

European Council President Charles Michel, European Commission President Ursula von der Leyen and European Parliament President David Sassoli pose in front of the house of French political economist and diplomat Jean Monnet in Bazoches-sur-Guyonne, France January 30, 2020. Thomas Samson/Pool via REUTERS

Chinese President Xi Jinping, Myanmar President Win Myint and Myanmar State Counsellor Aung San Suu Kyi attend a cermony marking the 70th anniversary of diplomatic relations between Myanmar and China in Naypyidaw, Myanmar, January 17, 2020. Photo taken on January 17, 2020, Myanmar News Agency/Pool via REUTERS

Chinese President Xi Jinping, Myanmar President Win Myint and Myanmar State Counsellor Aung San Suu Kyi attend a cermony marking the 70th anniversary of diplomatic relations between Myanmar and China in Naypyidaw, Myanmar, January 17, 2020. Photo taken on January 17, 2020, Myanmar News Agency/Pool via REUTERS

Chinese President Xi Jinping, Myanmar President Win Myint and Myanmar State Counsellor Aung San Suu Kyi attend a cermony marking the 70th anniversary of diplomatic relations between Myanmar and China in Naypyidaw, Myanmar, January 17, 2020. Photo taken on January 17, 2020, Myanmar News Agency/Pool via REUTERS

Diplomats watch a video of remarks by Brazil's Culture Secretary Roberto Alvim, for which Alvim was fired for appearing to copy a speech by Nazi propaganda chief Joseph Goebbels, as they gather at the Organization of American States for remarks by U.S. Secretary of State Mike Pompeo at the OAS in Washington, U.S. January 17, 2020. REUTERS/Jonathan Ernst

Diplomats gather to hear remarks by U.S. Secretary of State Mike Pompeo at the Organization of American States in Washington, U.S. January 17, 2020. REUTERS/Jonathan Ernst

Diplomats gather to hear remarks by U.S. Secretary of State Mike Pompeo at the Organization of American States in Washington, U.S. January 17, 2020. REUTERS/Jonathan Ernst

Diplomats gather to hear remarks by U.S. Secretary of State Mike Pompeo at the Organization of American States in Washington, U.S. January 17, 2020. REUTERS/Jonathan Ernst

U.S. Secretary of State Mike Pompeo greets diplomats after his remarks at the Organization of American States in Washington, U.S. January 17, 2020. REUTERS/Jonathan Ernst

U.S. Secretary of State Mike Pompeo greets diplomats after his remarks at the Organization of American States in Washington, U.S. January 17, 2020. REUTERS/Jonathan Ernst

Federal President Frank-Walter Steinmeier welcomes Dhia Hadi Mahmoud Al-Dabbass, Republic of Iraq Ambassador to Germany, at Bellevue Palace in Berlin, Germany, January 13, 2020. REUTERS/Annegret Hilse