On "The O'Reilly Factor" tonight, Sen. John McCain (R-AZ), author of the new book "13 Soldiers," said that President Obama's planned executive order on immigration - which would grant amnesty to millions of people living in the U.S. illegally without approval from the Senate - proves that Obama isn't interested in comprehensive immigration reform.

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"I'm very much afraid that he's going to take unilateral action, so he can go back to the Democrat Hispanic base, those that have been very critical of him not acting, and blame it all on the Republicans in Congress again."

McCain said he's not sure if Obama is trying to create a "civil war" for political reasons, but that will be the effect if he indeed takes executive action on immigration.

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McCain also weighed in on Obama's secret letter to Iran about our countries' shared interest in defeating ISIS.

He said thinking we can cooperate with the power that is probably our greatest enemy is naive, cynical and immoral.

Watch more above and be sure to pick up "13 Soldiers: A Personal History of Americans at War," available tomorrow, Nov. 11.

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