Paul blasts Rubio: 'We're lucky he wasn't president during the Cold War'

In his response Monday to Marco Rubio's support for the use of force against Russian aircraft in Syria, Kentucky Sen. Rand Paul said Americans are "really lucky" his Republican rival wasn't president during the Cold War.

The libertarian-leaning presidential hopeful, who splits from most of the GOP field on foreign policy, told CNBC that a no-fly zone in Syria and military conflict with Russian forces is a "terrible idea" and antithetical to former President Ronald Reagan's "peace through strength" doctrine.

"We are really lucky [Rubio] was never president during the Cold War," Paul told CNBC's John Harwood. "[Reagan] avoided a Cold War by, one, not setting red lines like that, continuing to have open communication with the Russians, having a strong enough defense to repel attack and to worry the Russians."

He continued, "This is where the Rubios and the McCains of this world need to re-examine history. When you look at what happened in Iraq, we spent a trillion dollars, we toppled Saddam Hussein. Who is their number one ally now? Iran. Who is Iran and Iraq allied with? Russia. Who gave Russia permission to fly over them to bring the equipment in? Iraq."

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