Washington (CNN) Ron Paul defended his controversial stance Friday that the United States should stay out of the crisis between Ukraine and Russia, and joked that he's "considering" supporting his son, Rand Paul, if the senator from Kentucky runs for President.

The former Texas congressman, who's considered by many to be the face of the libertarian movement, spoke at the International Students for Liberty Conference in Washington, immediately following a video address to the young crowd by National Security Agency leaker Edward Snowden.

Paul's remarks contained his usual non-interventionism rhetoric, even when he was challenged by a student from Kiev who asked why Paul hadn't denounced Russian aggression against Ukraine and the annexation of Crimea.

"Crimea is not exactly a foreign country, according to the Russians. But I'm neutral on that," the former presidential candidate argued.

"I don't take a pro-Russian stand. I don't defend what they do," he continued, adding that he thinks all foreign entities, including the United States, NATO and Europeans, should not be involved. "And get the Russians out."

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