A demonstrator is sprayed by the security forces with a water cannon during a protest to mark the International Human Rights Day as a national strike continues in Bogota, Colombia December 10, 2019. REUTERS/Luisa Gonzalez

Demonstrators clash with security forces during a protest to mark the International Human Rights Day as a national strike continues in Bogota, Colombia December 10, 2019. REUTERS/Luisa Gonzalez

Demonstrators take cover as they clash with security forces during a protest to mark the International Human Rights Day as a national strike continues in Bogota, Colombia December 10, 2019. REUTERS/Luisa Gonzalez

Soccer Football - Africa Under 23 Cup of Nations - Semi Final - Egypt U23 v South Africa U23 - Cairo International Stadium, Cairo, Egypt - November 19, 2019 General view as an Egypt fan is apprehended by security staff in the stands during the match REUTERS/Amr Abdallah Dalsh

Soccer Football - Africa Under 23 Cup of Nations - Semi Final - Egypt U23 v South Africa U23 - Cairo International Stadium, Cairo, Egypt - November 19, 2019 General view as an Egypt fan is apprehended by security staff in the stands during the match REUTERS/Amr Abdallah Dalsh

U.S. President Donald Trump holds a congratulatory phone call with (from left) Vice President Mike Pence, his daughter Ivanka Trump, NASA Administrator Jim Bridenstine and National Security Advisor Robert O'Brien for the first all-female space walk outside of the International Space Station with astronauts Christina Koch and Jessica Meir at the White House in Washington, D.C., U.S. October 18, 2019. REUTERS/Leah Millis

U.S. President Donald Trump holds a congratulatory phone call with (from left) his daughter Ivanka Trump, NASA Administrator Jim Bridenstine and National Security Advisor Robert O'Brien for the first all-female space walk outside of the International Space Station with astronauts Christina Koch and Jessica Meir at the White House in Washington, D.C., U.S. October 18, 2019. REUTERS/Leah Millis

U.S. President Donald Trump addresses a question from the news media after holding a congratulatory phone call with (from left) Vice President Mike Pence, his daughter Ivanka Trump, NASA Administrator Jim Bridenstine and National Security Advisor Robert O'Brien for the first all-female space walk outside of the International Space Station with astronauts Christina Koch and Jessica Meir at the White House in Washington, D.C., U.S. October 18, 2019. REUTERS/Leah Millis

U.S. President Donald Trump holds a congratulatory phone call with Vice President Mike Pence (L), his daughter Ivanka Trump, NASA Administrator Jim Bridenstine and National Security Advisor Robert O'Brien for the first all-female space walk outside of the International Space Station with astronauts Christina Koch and Jessica Meir at the White House in Washington, D.C., U.S. October 18, 2019. REUTERS/Leah Millis

Oleksandr Danyliuk, the secretary of Ukraine's National Security and Defence Council, attends a joint drill of departments of Interior Ministry at the International Training Centre near the village of Stare in Kiev region, Ukraine September 30, 2019. REUTERS/Gleb Garanich

Ukrainian President Volodymyr Zelenskiy and Oleksandr Danyliuk, the secretary of Ukraine's National Security and Defence Council, attend a joint drill of departments of Interior Ministry at the International Training Centre near the village of Stare in Kiev region, Ukraine September 30, 2019. REUTERS/Gleb Garanich

White House former National Security Advisor John Bolton departs after his remarks on North Korea at the Center for Strategic and International Studies (CSIS) think tank in Washington, U.S. September 30, 2019. REUTERS/Jonathan Ernst

White House former National Security Advisor John Bolton departs after his remarks on North Korea at the Center for Strategic and International Studies (CSIS) think tank in Washington, U.S. September 30, 2019. REUTERS/Jonathan Ernst

White House former National Security Advisor John Bolton delivers remarks on North Korea at the Center for Strategic and International Studies (CSIS) think tank in Washington, U.S. September 30, 2019. REUTERS/Jonathan Ernst

White House former National Security Advisor John Bolton fixes his hair and listens to a question after his remarks on North Korea at the Center for Strategic and International Studies (CSIS) think tank in Washington, U.S. September 30, 2019. REUTERS/Jonathan Ernst

White House former National Security Advisor John Bolton is seen in video camera's screen as he delivers remarks on North Korea at the Center for Strategic and International Studies (CSIS) think tank in Washington, U.S. September 30, 2019. REUTERS/Jonathan Ernst

White House former National Security Advisor John Bolton delivers remarks on North Korea at the Center for Strategic and International Studies (CSIS) think tank in Washington, U.S. September 30, 2019. REUTERS/Jonathan Ernst

White House former National Security Advisor John Bolton fixes his hair and listens to a question after his remarks on North Korea at the Center for Strategic and International Studies (CSIS) think tank in Washington, U.S. September 30, 2019. REUTERS/Jonathan Ernst

White House former National Security Advisor John Bolton listens to a question after his remarks on North Korea at the Center for Strategic and International Studies (CSIS) think tank in Washington, U.S. September 30, 2019. REUTERS/Jonathan Ernst

White House former National Security Advisor John Bolton delivers remarks on North Korea at the Center for Strategic and International Studies (CSIS) think tank in Washington, U.S. September 30, 2019. REUTERS/Jonathan Ernst

White House former National Security Advisor John Bolton delivers remarks on North Korea at the Center for Strategic and International Studies (CSIS) think tank in Washington, U.S. September 30, 2019. REUTERS/Jonathan Ernst

U.S. President Donald Trump talks to the news media with his newly announced White House national security adviser Robert O'Brien after the president named O'Brien as his fourth national security adviser at Los Angeles International Airport in Los Angeles, California, U.S., September 18, 2019. REUTERS/Tom Brenner TPX IMAGES OF THE DAY

U.S. President Donald Trump boards Air Force One with his newly announced White House national security adviser Robert O'Brien after the president named O'Brien as his fourth national security adviser at Los Angeles International Airport in Los Angeles, California, U.S., September 18, 2019. REUTERS/Tom Brenner

U.S. President Donald Trump gives a thumbs up as he boards Air Force One with his newly announced White House national security adviser Robert O'Brien after the president named O'Brien as his fourth national security adviser at Los Angeles International Airport in Los Angeles, California, U.S., September 18, 2019. REUTERS/Tom Brenner

U.S. President Donald Trump talks to reporters with U.S. hostage negotiator Robert O'Brien after he named O'Brien as his fourth White House national security adviser at Los Angeles International Airport in Los Angeles, California, U.S., September 18, 2019. REUTERS/Tom Brenner

U.S. President Donald Trump and his newly announced White House national security adviser Robert O'Brien speak to reporters after the president named O'Brien as his fourth national security adviser at Los Angeles International Airport in Los Angeles, California, U.S., September 18, 2019. REUTERS/Tom Brenner

U.S. President Donald Trump listens to his newly announced White House national security adviser Robert O'Brien speak to reporters after he named O'Brien as his fourth national security adviser at Los Angeles International Airport in Los Angeles, California, U.S., September 18, 2019. REUTERS/Tom Brenner

U.S. President Donald Trump walks with U.S. hostage negotiator Robert O'Brien after he named O'Brien as his fourth White House national security adviser at Los Angeles International Airport in Los Angeles, California, U.S., September 18, 2019. REUTERS/Tom Brenner

U.S. President Donald Trump faces reporters with U.S. hostage negotiator Robert O'Brien after he named O'Brien as his fourth White House national security adviser at Los Angeles International Airport in Los Angeles, California, U.S., September 18, 2019. REUTERS/Tom Brenner

U.S. President Donald Trump walks to the microphones with U.S. hostage negotiator Robert O'Brien after he named O'Brien as his fourth White House national security adviser at Los Angeles International Airport in Los Angeles, California, U.S., September 18, 2019. REUTERS/Tom Brenner

U.S. President Donald Trump talks to reporters with U.S. hostage negotiator Robert O'Brien after he named O'Brien as his fourth White House national security adviser at Los Angeles International Airport in Los Angeles, California, U.S., September 18, 2019. REUTERS/Tom Brenner

U.S. President Donald Trump faces reporters with U.S. hostage negotiator Robert O'Brien after he named O'Brien as his fourth White House national security adviser at Los Angeles International Airport in Los Angeles, California, U.S., September 18, 2019. REUTERS/Tom Brenner

Soccer Football - Africa Cup of Nations 2019 - Semi Final - Algeria v Nigeria - Cairo International Stadium, Cairo, Egypt - July 14, 2019 A fan who jumped over the barrier is shielded from stadium security by Algeria players REUTERS/Sumaya Hisham

REFILE - CORRECTING TYPO Brazil's Minister of Institutional Security Augusto Heleno looks on during a meeting of the Commission of Foreign and International Affairs and National Defense at the National Congress in Brasilia, Brazil July 10, 2019. REUTERS/Adriano Machado

REFILE - CORRECTING TYPO Brazil's Minister of Institutional Security Augusto Heleno attends a meeting of the Commission of Foreign and International Affairs and National Defense at the National Congress in Brasilia, Brazil July 10, 2019. REUTERS/Adriano Machado

REFILE - CORRECTING TYPO Brazil's Minister of Institutional Security Augusto Heleno attends a meeting of the Commission of Foreign and International Affairs and National Defense at the National Congress in Brasilia, Brazil July 10, 2019. REUTERS/Adriano Machado

Soccer Football - Africa Cup of Nations 2019 - Round of 16 - Egypt v South Africa - Cairo International Stadium, Cairo, Egypt - July 6, 2019 General view of security outside the stadium before the match REUTERS/Amr Abdallah Dalsh

Soccer Football - Africa Cup of Nations 2019 - Round of 16 - Uganda v Senegal - Cairo International Stadium, Cairo, Egypt - July 5, 2019 Security outside the stadium before the match REUTERS/Amr Abdallah Dalsh

Soccer Football - Africa Cup of Nations 2019 - Round of 16 - Uganda v Senegal - Cairo International Stadium, Cairo, Egypt - July 5, 2019 Security outside the stadium before the match REUTERS/Amr Abdallah Dalsh

Employees and security are seen in front of the main entrance of the Cairo International Stadium, ahead of the Africa Cup of Nations opening in Cairo, Egypt June 19, 2019. Picture taken June 19, 2019. REUTERS/Amr Abdallah Dalsh

Security and police officers take their position in front of the main entrance of the Cairo International Stadium, ahead of the Africa Cup of Nations opening in Cairo, Egypt June 19, 2019. Picture taken June 19, 2019. REUTERS/Amr Abdallah Dalsh

A security guard sits on the stand of the Cairo International Stadium ahead of the Africa Cup of Nations opening in Cairo, Egypt June 19, 2019. Picture taken June 19, 2019. REUTERS/Amr Abdallah Dalsh

Egyptian employees and security complete their work on the field of the Cairo International Stadium, ahead of the Africa Cup of Nations opening in Cairo, Egypt June 19, 2019. Picture taken June 19, 2019. REUTERS/Amr Abdallah Dalsh

Employees and security personnel are seen beside a drawing for tournament inside the Cairo International Stadium ahead of the Africa Cup of Nations opening soccer match between Egypt and Zimbabwe in Cairo, Egypt June 19, 2019. REUTERS/Amr Abdallah Dalsh

Employees and security personnel are seen inside the Cairo International Stadium ahead of the Africa Cup of Nations opening soccer match between Egypt and Zimbabwe in Cairo, Egypt June 19, 2019. REUTERS/Amr Abdallah Dalsh

Employees and security personnel are seen inside the Cairo International Stadium ahead of the Africa Cup of Nations opening soccer match between Egypt and Zimbabwe in Cairo, Egypt June 19, 2019. REUTERS/Amr Abdallah Dalsh

A security employee looks on inside the Cairo International Stadium ahead of the Africa Cup of Nations opening soccer match between Egypt and Zimbabwe in Cairo, Egypt June 19, 2019. REUTERS/Amr Abdallah Dalsh

Security and police officers take their position at the entrance of the Cairo International Stadium ahead of the Africa Cup of Nations opening soccer match between Egypt and Zimbabwe in Cairo, Egypt June 19, 2019. REUTERS/Amr Abdallah Dalsh

Employees and security are seen inside the Cairo International Stadium ahead of the Africa Cup of Nations opening soccer match between Egypt and Zimbabwe in Cairo, Egypt June 19, 2019. REUTERS/Amr Abdallah Dalsh

A general view of Cairo International Stadium as employees and security complete their work ahead of the Africa Cup of Nations opening soccer match between Egypt and Zimbabwe in Cairo, Egypt June 19, 2019. REUTERS/Amr Abdallah Dalsh

A general view of Cairo International Stadium as employees and security complete their work ahead of the Africa Cup of Nations opening soccer match between Egypt and Zimbabwe in Cairo, Egypt June 19, 2019. REUTERS/Amr Abdallah Dalsh

Khairi Al-Tamimi, head of the General Commander’s Office of the Libyan National Army (LNA) led by Khalifa Haftar, attends the annual Moscow Conference on International Security (MCIS) in Moscow, Russia April 24, 2019. REUTERS/Maxim Shemetov

Jean-Pierre Lacroix, United Nations Under-Secretary-General for Peacekeeping Operations, delivers a speech during the annual Moscow Conference on International Security (MCIS) in Moscow, Russia April 24, 2019. REUTERS/Maxim Shemetov

Acting U.S. Secretary of Defense Patrick Shanahan speaks at a “Strategic National Security Space: FY2020 Budget and Policy Forum,” hosted by the Center for Strategic and International Studies (CSIS), in Washington, U.S., March 20, 2019. REUTERS/Jonathan Ernst

Acting U.S. Secretary of Defense Patrick Shanahan speaks at a “Strategic National Security Space: FY2020 Budget and Policy Forum,” hosted by the Center for Strategic and International Studies (CSIS), in Washington, U.S., March 20, 2019. REUTERS/Jonathan Ernst

Acting U.S. Secretary of Defense Patrick Shanahan speaks at a “Strategic National Security Space: FY2020 Budget and Policy Forum,” hosted by the Center for Strategic and International Studies (CSIS), in Washington, U.S., March 20, 2019. REUTERS/Jonathan Ernst

Acting U.S. Secretary of Defense Patrick Shanahan speaks at a “Strategic National Security Space: FY2020 Budget and Policy Forum,” hosted by the Center for Strategic and International Studies (CSIS) in Washington, U.S., March 20, 2019. REUTERS/Jonathan Ernst

President Donald Trump faced battles across many fronts in 2018, ending the year politically weakened after his Republican Party lost control of the U.S. House of Representatives at midterm elections in November. He began the year much as he ended 2017. He faced internal strife in a White House gripped by chaos and drama, losing his staff secretary, Rob Porter, who was forced out when allegations surfaced of past domestic abuse. National security adviser H.R. McMaster was removed, and was replaced by hard-charging John Bolton. Aide Hope Hicks resigned after years of service to Trump. The year ended with Trump pushing out Attorney General Jeff Sessions and White House Chief of Staff John Kelly. REUTERS/Leah Millis SEARCH "TRUMP POY" FOR THIS STORY. SEARCH "REUTERS POY" FOR ALL BEST OF 2018 PACKAGES. TPX IMAGES OF THE DAY. Matching text: USA-TRUMP/POY

Security forces stand guard while Vital Kamerhe, leader of the Union for the Congolese Nation (UNC) party, with Felix Tshisekedi, leader of Congolese main opposition the Union for Democracy and Social Progress (UDPS) party and presidential candidate, arrive at N'djili International Airport in Kinshasa, Democratic Republic of Congo November 27, 2018. REUTERS/Kenny Katombe

Supporters and security forces are seen while Vital Kamerhe, leader of the Union for the Congolese Nation (UNC) party, with Felix Tshisekedi, leader of Congolese main opposition the Union for Democracy and Social Progress (UDPS) party and presidential candidate, arrive at N'djili International Airport in Kinshasa, Democratic Republic of Congo November 27, 2018. REUTERS/Kenny Katombe