Turkey's President Recep Tayyip Erdogan is visiting the White House on May 16, during which he is expected to try to convince US President Donald Trump to stop arming a Kurdish rebel group in Syria that Ankara considers a "terrorist" group.

 

It is a critical time for their alliance, which is facing an uncertain future on several fronts.

 

Al Jazeera's Patty Culhane reports from Washington, DC.

US & Canada, War & Conflict