If the foreign visitor declines to share such information, he or she could be denied entry.
Sources told CNN that the idea is just in the preliminary discussion level. The social media posts calling for jihad by San Bernardino terrorist Tashfeen Malik -- made under a pseudonym and with strict privacy settings -- are part of this discussion. How such a policy would be implemented remains under discussion.
Miller praised the State Department on Saturday, sources tell CNN, but argued that the government needs to do better job of making sure the people who come into the US embrace American values.