Rand Paul in CNN/Salem GOP Debate

On Immigration: To defend against terrorism, we need to defend the border

RUBIO: What he's pointing to is an amendment that only 10 people voted for. You know why? Because it's not focused on terrorists. It would have banned anyone from coming here. Someone from Taiwan would not have been able to come here as a tourist.

PAUL: What I put forward was an amendment that would have temporarily halted immigration from high-risk terrorist countries. I wanted them to go through Global Entry, which is a program where we do background checks.

On Technology: We are no safer due to bulk data collection of phone records

RUBIO: Here's the world we live in. This is a radical jihadist group that is increasingly sophisticated in its abilities. We are now at a time when we need more tools, not less tools. And that tool we lost, the metadata program, was a valuable tool that we no longer have at our disposal. This tool allowed the National Security Agency and other intelligence agencies to quickly and rapidly access phone records and match them up with other phone records to see who terrorists have been calling.

PAUL: You know, I think Marco gets it completely wrong. We are not any safer through the bulk collection of all Americans' records. In fact, I think we're less safe. We get so distracted by all of the information, we're not spending enough time getting specific information on terrorists. The one thing that might have stopped San Bernardino--that might have stopped 9/11--would have been stricter controls on those who came here.

On War & Peace: No-fly zone in Syria means WWIII against Russians

CHRISTIE: Not only would I be prepared to do it, I would do it. Yes, we would shoot down the planes of Russian pilots.

PAUL: Well, I think if you're in favor of World War III, you have your candidate. My goodness, what we want in a leader is someone with judgment, not someone who is so reckless as to stand on the stage and say, "Yes, I'm going to shoot down Russian planes." Russia already flies in that airspace. It may not be something we're in love with the fact that they're there, but they were invited by Iraq and by Syria to fly in that airspace. And so if we announce we're going to have a no-fly zone, it is a recipe for disaster. It's a recipe for World War III. We need to confront Russia from a position of strength, but we don't need to confront Russia from a point of recklessness that would lead to war.