On "The Kelly File" tonight, Sen. Rand Paul (R-KY) reacted to Megyn Kelly's interview with Jeb Bush.

Paul began by saying that he thought the invasion of Iraq was a mistake. 

"I thought it was a mistake even at the time,” he stated. "I think it's a mistake for a reason that I think is consistent with a lot of other things that have gone wrong in the Middle East. I think when we've toppled secular strong men, secular dictators, we've gotten chaos and the rise of radical Islam." 

He said that “Iran is much stronger with Hussein gone.” 

Paul added that “if we don’t learn from history, we’re making another error and we’ll continue to make errors.”

He remarked that he thinks "Iran is more of a threat" and that he has "never really indicated that they were of no threat." 

Kelly also questioned Paul on how he responds to critics who question his stance on government surveillance programs. 

"The greatest thing that has endangered our security in the last couple years is when the director of national intelligence lied to us," Paul replied. “The intelligence community could do horrific things to invade our privacy.”

"I think most of the time they don't. But when they lie to us, we lose trust and that actually makes intelligence [gathering] worse," he added. 

Watch the video above to hear more from the presidential contender.

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