President Donald Trump's national security adviser said on Sunday the US military withdrawal from northeastern Syria is conditional upon finishing off the armed group, ISIL, and on Turkey assuring the safety of Kurdish troops allied with the United States.

John Bolton, who travelled to Israel to reassure the US ally of the Trump-ordered withdrawal, said there is no timetable for the pullout of American forces in northeastern Syria, but insisted it's not an unlimited commitment.

Joost Hiltermann, MENA program director with the International Crisis Group, talks to Al Jazeera about the US policy in Syria.

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