Republican Sens. John McCain and Lindsey Graham are criticizing President Obama's strategy to fight the Islamic State as an "indirect approach," and say the U.S. needs a real plan that involves sending 10,000 U.S. troops in the Middle East.

"What's needed is a strategy to destroy ISIS — not 'ultimately,' as the president said last year, but as quickly as possible," the two wrote in a Wall Street Journal op-ed. They wrote in response to Obama's Sunday night speech, in which Obama insisted that he has a strategy to destroy the terror group.

According to the senators, the U.S. "still does not have the initiative" after more than a year of "an indecisive military campaign." And all the while, "the threat is growing and evolving."

"What's needed is a comprehensive civil-military strategy to destroy ISIS quickly, while creating conditions that can prevent it, or a threat like it, from ever re-emerging. In short, America must not only win the war, but also prepare to win the peace," McCain and Graham wrote. They specifically said this action "will likely require two to three times as many forces as the U.S. has in Iraq now."

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