Mitt Romney is blaming President Obama for "doing the minimum" to fight the Islamic State.

In an op-ed published Sunday, the 2012 Republican presidential candidate criticized Obama for having said "we have contained" the Islamic State in an interview with ABC News' George Stephanopoulos one day before a series of attacks hit Paris, for which the Islamic State claimed responsibility. Romney said the U.S. needs to "eradicate" the Islamic State, not contain it.

"The president was right when he called the Islamic State a cancer," Romney said, "but it is a cancer that metastasized on his watch. Paris is proof."

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The U.S. year-long airstrike campaign has not been sufficient, Romney added, and called for military experts from the U.S. and NATO to create a comprehensive strategy that would incorporate the forces of the Kurds, Turks, Saudis, Egyptians and Jordanians.

His remarks come as France launched airstrikes against the Islamic State on Sunday, carried out in coordination with U.S. forces, in retaliation for the terror attacks in Paris that left 127 dead and over 350 injured.

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