Turkish President Tayyip Erdogan and Iraqi Prime Minister Haider al-Abadi attend a news conference in Ankara, Turkey, August 14, 2018. REUTERS/Umit Bektas

Turkish President Tayyip Erdogan and Iraqi Prime Minister Haider al-Abadi attend a news conference in Ankara, Turkey, August 14, 2018. REUTERS/Umit Bektas

Turkish President Tayyip Erdogan and Iraqi Prime Minister Haider al-Abadi attend a news conference in Ankara, Turkey, August 14, 2018. REUTERS/Umit Bektas

Turkish President Tayyip Erdogan shakes hands with Iraqi Prime Minister Haider al-Abadi after a news conference in Ankara, Turkey, August 14, 2018. REUTERS/Umit Bektas

Turkish President Tayyip Erdogan shakes hands with Iraqi Prime Minister Haider al-Abadi after a news conference in Ankara, Turkey, August 14, 2018. REUTERS/Umit Bektas

Iraqi Prime Minister Haider al-Abadi attends a news conference in Ankara, Turkey, August 14, 2018. REUTERS/Umit Bektas

Iraqi Prime Minister Haider al-Abadi attends a news conference in Ankara, Turkey, August 14, 2018. REUTERS/Umit Bektas

A protester holds a picture of Iraqi Prime Minister Haider al-Abadi with "Step Down" written on it during a protest at Tahrir square in Baghdad, Iraq July 27, 2018. REUTERS/Thaier al-Sudani

Iraqi Prime Minister Haider al-Abadi arrives for the second day of a NATO summit in Brussels, Belgium, July 12, 2018. Tatyana Zenkovich/Pool via REUTERS

Iraqi Prime Minister Haider al-Abadi arrives for the second day of a NATO summit in Brussels, Belgium, July 12, 2018. Tatyana Zenkovich/Pool via REUTERS

Iraqi Shi'ite cleric Moqtada al-Sadr, who's bloc came first, looks at Iraqi Prime Minister Haider al-Abadi, who's political bloc came third in a May parliamentary election, during a news conference in Najaf, Iraq June 23, 2018. REUTERS/Alaa al-Marjani

Iraqi Shi'ite cleric Moqtada al-Sadr, who's bloc came first, attends a news conference with Iraqi Prime Minister Haider al-Abadi, who's political bloc came third in a May parliamentary election, in Najaf, Iraq June 23, 2018. REUTERS/Alaa al-Marjani

Iraqi Shi'ite cleric Moqtada al-Sadr, who's bloc came first, looks at Iraqi Prime Minister Haider al-Abadi, who's political bloc came third in a May parliamentary election, during a news conference in Najaf, Iraq June 23, 2018. REUTERS/Alaa al-Marjani

Iraqi Shi'ite cleric Moqtada al-Sadr, who's bloc came first, speaks during a news conference with Iraqi Prime Minister Haider al-Abadi, who's political bloc came third in a May parliamentary election, in Najaf, Iraq June 23, 2018. REUTERS/Alaa al-Marjani

Iraqi Prime Minister Haider al-Abadi, who's political bloc came third in a May parliamentary election, attends a news conference with Iraqi Shi'ite cleric Moqtada al-Sadr, who's bloc came first, in Najaf, Iraq June 23, 2018. REUTERS/Alaa al-Marjani

Iraqi Shi'ite cleric Moqtada al-Sadr, who's bloc came first, attends a news conference with Iraqi Prime Minister Haider al-Abadi, who's political bloc came third in a May parliamentary election, in Najaf, Iraq June 23, 2018. REUTERS/Alaa al-Marjani

Iraqi Shi'ite cleric Moqtada al-Sadr, who's bloc came first, meets with Iraqi Prime Minister Haider al-Abadi, who's political bloc came third in a May parliamentary election, in Najaf, Iraq June 23, 2018. REUTERS/Alaa al-Marjani

Iraqi Prime Minister Haider al-Abadi, who's political bloc came third in a May parliamentary election, meets with cleric Moqtada al-Sadr, who's bloc came first, in Najaf, Iraq June 23, 2018. REUTERS/Alaa al-Marjani

Iraqi Prime Minister Haider al-Abadi, who's political bloc came third in a May parliamentary election, (L) meets with cleric Moqtada al-Sadr, who's bloc came first, in Najaf, Iraq June 23, 2018. REUTERS/Alaa al-Marjani

Iraqi Prime Minister Haider al-Abadi attends the election campaign, along with his supporters, ahead of the parliamentary election in Kerbala, Iraq May 4, 2018. REUTERS/Abdullah Dhiaa al-Deen

Iraqi Prime Minister Haider al-Abadi speaks to his supporters during the campaign, ahead of the parliamentary election in Kerbala, Iraq May 4, 2018. REUTERS/Abdullah Dhiaa al-Deen

Iraqi Prime Minister Haider al-Abadi speaks to his supporters during the campaign, ahead of the parliamentary election in Kerbala, Iraq May 4, 2018. REUTERS/Abdullah Dhiaa al-Deen

Supporters of Iraqi Prime Minister Haider al-Abadi gather during a campaign, ahead of the parliamentary election in Kerbala, Iraq May 4, 2018. REUTERS/Abdullah Dhiaa al-Deen

Supporters of Iraqi Prime Minister Haider al-Abadi gather during a campaign, ahead of the parliamentary election in Kerbala, Iraq May 4, 2018. REUTERS/Abdullah Dhiaa al-Deen

Iraqi Prime Minister Haider al-Abadi (L) and Japan's Prime Minister Shinzo Abe attend their joint news conference at Abe's official residence in Tokyo, Japan April 5, 2018. REUTERS/Kim Kyung-Hoon/Pool

Iraqi Prime Minister Haider al-Abadi (L) and Japan's Prime Minister Shinzo Abe attend their joint news conference at Abe's official residence in Tokyo, Japan April 5, 2018. REUTERS/Kim Kyung-Hoon/Pool

Iraqi Prime Minister Haider al-Abadi (L) and Japan's Prime Minister Shinzo Abe attend their joint news conference at Abe's official residence in Tokyo, Japan April 5, 2018. REUTERS/Kim Kyung-Hoon/Pool

Japan's Prime Minister Shinzo Abe is seen as he meets with Iraqi Prime Minister Haider al-Abadi at Abe's official residence in Tokyo, Japan April 5, 2018. REUTERS/Kim Kyung-Hoon/Pool

Iraqi Prime Minister Haider al-Abadi meets Japan's Prime Minister Shinzo Abe at Abe's official residence in Tokyo, Japan April 5, 2018. REUTERS/Kim Kyung-Hoon/Pool

Iraqi Prime Minister Haider al-Abadi (L) meets Japan's Prime Minister Shinzo Abe at Abe's official residence in Tokyo, Japan April 5, 2018. REUTERS/Kim Kyung-Hoon/Pool

Iraqi Prime Minister Haider al-Abadi (L) meets Japan's Prime Minister Shinzo Abe at Abe's official residence in Tokyo, Japan April 5, 2018. REUTERS/Kim Kyung-Hoon/Pool

Iraqi Foreign Minister Ibrahim al-Jaafari (6th L/front low), Iraqi Prime Minister Haider al-Abadi (7th L/front low), Japan's Prime Minister Shinzo Abe (8th L/front low) and Japan's Foreign Minister Taro Kono (9th L/front low) attend a family photo session of the Tokyo Conference on Supporting Job Creation and Vocational Training to Facilitate Weapons Reduction for Iraqi Society in Tokyo, Japan, April 5, 2018. REUTERS/Toru Hanai

Iraqi Prime Minister Haider al-Abadi (L) and Japan's Prime Minister Shinzo Abe attend a family photo session of the Tokyo Conference on Supporting Job Creation and Vocational Training to Facilitate Weapons Reduction for Iraqi Society in Tokyo, Japan, April 5, 2018. REUTERS/Toru Hanai

Iraqi Prime Minister Haider al-Abadi (L) and Japan's Prime Minister Shinzo Abe attend a family photo session of the Tokyo Conference on Supporting Job Creation and Vocational Training to Facilitate Weapons Reduction for Iraqi Society in Tokyo, Japan, April 5, 2018. REUTERS/Toru Hanai

Iraqi Prime Minister Haider al-Abadi (L) and Japan's Prime Minister Shinzo Abe attend the Tokyo Conference on Supporting Job Creation and Vocational Training to Facilitate Weapons Reduction for Iraqi Society in Tokyo, Japan, April 5, 2018. REUTERS/Toru Hanai

Iraqi Prime Minister Haider al-Abadi speaks during the Tokyo Conference on Supporting Job Creation and Vocational Training to Facilitate Weapons Reduction for Iraqi Society in Tokyo, Japan, April 5, 2018. REUTERS/Toru Hanai

Iraqi Foreign Minister Ibrahim al-Jaafari (L), Iraqi Prime Minister Haider al-Abadi (2nd L), Japan's Prime Minister Shinzo Abe (2nd R) and Japan's Foreign Minister Taro Kono (R) attend the Tokyo Conference on Supporting Job Creation and Vocational Training to Facilitate Weapons Reduction for Iraqi Society in Tokyo, Japan, April 5, 2018. REUTERS/Toru Hanai

Iraqi Prime Minister Haider al-Abadi (L) and Japan's Prime Minister Shinzo Abe attend the Tokyo Conference on Supporting Job Creation and Vocational Training to Facilitate Weapons Reduction for Iraqi Society in Tokyo, Japan, April 5, 2018. REUTERS/Toru Hanai

Iraqi Prime Minister Haider al-Abadi (L) and Japan's Prime Minister Shinzo Abe attend the Tokyo Conference on Supporting Job Creation and Vocational Training to Facilitate Weapons Reduction for Iraqi Society in Tokyo, Japan, April 5, 2018. REUTERS/Toru Hanai

Iraq's Prime Minister Haider al-Abadi (L) attends the Iraq Energy Forum in Baghdad, Iraq March 28, 2018. REUTERS/Khalid al-Mousily

Iraq's Prime Minister Haider al-Abadi speaks during the Iraq Energy Forum in Baghdad, Iraq March 28, 2018. REUTERS/Khalid al-Mousily

Iraq's Prime Minister Haider al-Abadi speaks during the Iraq Energy Forum in Baghdad, Iraq March 28, 2018. REUTERS/Khalid al-Mousily

Iraq's Prime Minister Haider al-Abadi speaks during the Iraq Energy Forum in Baghdad, Iraq March 28, 2018. REUTERS/Khalid al-Mousily

Iraq's Prime Minister Haider al-Abadi attends the ceremony of "Baghdad is the Capital of Arab Media", in Baghdad, Iraq, January 27, 2018. REUTERS/Thaier Al-Sudani

Iraq's Prime Minister Haider al-Abadi speaks during a ceremony of Baghdad is the Capital of Arab Media, in Baghdad, Iraq, January 27, 2018. REUTERS/Thaier Al-Sudani

Iraq's Prime Minister Haider al-Abadi speaks during a ceremony of Baghdad is the Capital of Arab Media, in Baghdad, Iraq, January 27, 2018. REUTERS/Thaier Al-Sudani

Iraq's Prime Minister Haider al-Abadi speaks during a ceremony in Najaf, Iraq January 7, 2018. REUTERS/Alaa Al-Marjani

Iraq's Prime Minister Haider al-Abadi speaks during a ceremony in Najaf, Iraq January 7, 2018. REUTERS/Alaa Al-Marjani

MIDEAST-CRISIS/IRAQ-REFUGEES - Managing over three million Iraqis displaced by the war against IS is one of Iraqi Prime Minister Haider al-Abadi’s most daunting tasks.

French President Emmanuel Macron (R) and Iraqi Prime Minister Haider al-Abadi talk on the "Mirage" boat prior to arrive at the One Planet Summit in Boulogne-Billancourt, near Paris, France December 12, 2017. REUTERS/Ludovic Marin/Pool

Turkish Prime Minister Binali Yildirim and his Iraqi counterpart Haider al-Abadi attend a welcoming ceremony in Ankara, Turkey, October 25, 2017. REUTERS/Umit Bektas

Turkish Prime Minister Binali Yildirim and his Iraqi counterpart Haider al-Abadi attend a welcoming ceremony in Ankara, Turkey, October 25, 2017. REUTERS/Umit Bektas

Turkish Prime Minister Binali Yildirim and his Iraqi counterpart Haider al-Abadi attend a welcoming ceremony in Ankara, Turkey, October 25, 2017. REUTERS/Umit Bektas

Turkish Prime Minister Binali Yildirim and his Iraqi counterpart Haider al-Abadi attend a welcoming ceremony in Ankara, Turkey, October 25, 2017. REUTERS/Umit Bektas

Turkish Prime Minister Binali Yildirim meets with his Iraqi counterpart Haider al-Abadi in Ankara, Turkey, October 25, 2017. REUTERS/Umit Bektas

The city of Baghdad is seen out the door during a helicopter lift for U.S. Secretary of State Rex Tillerson to return after meeting with Iraqi Prime Minister Haider al-Abadi, and Iraqi President Fuad Masum, in Baghdad, Iraq October 23, 2017. REUTERS/Alex Brandon/Pool

The crew chief uses night vision goggles during a helicopter lift for Secretary of State Rex Tillerson to return after meeting with Iraqi Prime Minister Haider al-Abadi, and Iraqi President Fuad Masum, in Baghdad, Iraq October 23, 2017. REUTERS/Alex Brandon/Pool

Iraq's Prime Minister Haider al-Abadi speaks with U.S. Secretary of State Rex Tillerson (not pictured) in Baghdad, Iraq October 23, 2017. REUTERS/Alex Brandon/Pooll

U.S. Secretary of State Rex Tillerson (2-L) listens as Iraqi Prime Minister Haider al-Abadi (R) speaks during their meeting in Baghdad, Iraq October 23, 2017. REUTERS/Alex Brandon/Pool

U.S. Secretary of State Rex Tillerson (2-L) listens as Iraqi Prime Minister Haider al-Abadi (C) speaks during their meeting in Baghdad, Iraq October 23, 2017. REUTERS/Alex Brandon/Pool