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WASHINGTON, DC - MAY 16: U.S. President Donald Trump (L) welcomes President Recep Tayyip Erdogan (R) of Turkey outside the West Wing of the White House May 16, 2017 in Washington, DC. President Trump hosted President ErdoganÊwith an Oval Office meeting and a working luncheon. Both leaders are expected to give a joint statement. (Photo by Alex Wong/Getty Images)

WASHINGTON, DC - MAY 16:  U.S. President Donald Trump (L) welcomes President Recep Tayyip Erdogan (R) of Turkey outside the West Wing of the White House May 16, 2017 in Washington, DC. President Trump hosted President ErdoganÊwith an Oval Office meeting and a working luncheon. Both leaders are expected to give a joint statement.  (Photo by Alex Wong/Getty Images)

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WASHINGTON, DC - MAY 16: US President Donald Trump (R) shakes hands with President of Turkey Recep Tayyip Erdogan (L) in the Roosevelt Room where they issued a joint statement, at the White House on May 16, 2017 in Washington, DC. Trump and Erdogan face the issue of working out cooperation in the fight against terrorism as Turkey objects to the US arming of Kurdish forces in Syria. (Photo by Michael Reynolds-Pool/Getty Images)

WASHINGTON, DC - MAY 16: US President Donald Trump (R) shakes hands with President of Turkey Recep Tayyip Erdogan (L) in the Roosevelt Room where they issued a joint statement, at the White House on May 16, 2017  in Washington, DC. Trump and Erdogan face the issue of working out cooperation in the fight against terrorism as Turkey objects to the US arming of Kurdish forces in Syria. (Photo by Michael Reynolds-Pool/Getty Images)

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President Trump welcomed President Recep Tayyip Erdogan of Turkey, at the West Wing Portico (North Lawn) of the White House, On Monday, May 16, 2017. (Photo by Cheriss May/NurPhoto via Getty Images)

President Trump welcomed  President Recep Tayyip Erdogan of Turkey, at the West Wing Portico (North Lawn) of the White House, On Monday, May 16, 2017.  (Photo by Cheriss May/NurPhoto via Getty Images)

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President Trump welcomed President Recep Tayyip Erdogan of Turkey, at the West Wing Portico (North Lawn) of the White House, On Monday, May 16, 2017. (Photo by Cheriss May/NurPhoto via Getty Images)

President Trump welcomed  President Recep Tayyip Erdogan of Turkey, at the West Wing Portico (North Lawn) of the White House, On Monday, May 16, 2017.  (Photo by Cheriss May/NurPhoto via Getty Images)

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President Trump welcomed President Recep Tayyip Erdogan of Turkey, at the West Wing Portico (North Lawn) of the White House, On Monday, May 16, 2017. (Photo by Cheriss May/NurPhoto via Getty Images)

President Trump welcomed  President Recep Tayyip Erdogan of Turkey, at the West Wing Portico (North Lawn) of the White House, On Monday, May 16, 2017.  (Photo by Cheriss May/NurPhoto via Getty Images)