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Republican presidential candidate Jeb Bush rejected Hillary Clinton's assertion that the fight against the Islamic State "cannot be an American fight," and said U.S. leadership is needed after the terrorist group's apparent attack against France on Friday night that left more than 120 dead.

"Hillary Clinton last night said that it's not our fight," Bush said on CNN, just hours after Clinton's remarks at the second Democratic debate. "It is our fight."

Clinton did say the Islamic State has to be destroyed, but then implied that it's up to other countries to organize and defeat the group by saying it's not "an American fight." Bush said that's the wrong approach and that American leadership has been the missing ingredient that has allowed ISIS to strike out against western countries.

"I think we need to lead as it relates to taking action in Syria and Iraq to eradicate ISIS from the face of the Earth," he said. "That should be our first and foremost responsibility."

"This is a warning for our country that this threat is not going to go away. This is a threat against western civilization, and we need to lead," he added. "The United States has pulled back, and when we pull back, voids are filled."

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