North Korea has an abysmal record when it comes to human rights. Dennis has been traveling to and from North Korea and socializing with Kim Jong Un.
He is not a government official. He is not visiting in an official capacity and due to his fraternization with the dictator one can say he is "sleeping with the enemy".
He has yet to use his relationship with Kim Jong Un to secure the release of Kenneth Bae and consequently is acting AGAINST the best interests of the US.
Cancel his passport.