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Iraqi forces and members of the Hashed al-Shaabi (Popular Mobilisation units) enter the city of al-Qaim, in Iraq's western Anbar province near the Syrian border as they fight against remnant pockets of Islamic State group jihadists on November 3, 2017.  / AFP PHOTO / AHMAD AL-RUBAYE        (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)
Iraqi forces and members of the Hashed al-Shaabi (Popular Mobilisation units) enter the city of al-Qaim, in Iraq's western Anbar province near the Syrian border as they fight against remnant pockets of Islamic State group jihadists on November 3, 2017.  / AFP PHOTO / AHMAD AL-RUBAYE        (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)

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    Fareed: The war against ISIS turns to ideology

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Fareed: The war against ISIS turns to ideology

Fareed Zakaria suggests that while the ground war against ISIS favors the US and its allies, the ideological fight poses a greater challenge.

Fareed: The war against ISIS turns to ideology

Fareed Zakaria suggests that while the ground war against ISIS favors the US and its allies, the ideological fight poses a greater challenge.