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Security concerns dogging Musk are unusual given his company's national security role

Rachel Maddow looks at Elon Musk's deep business ties to China and the security concerns, some of which stem from his private meetings with foreign leaders, that dog him and keep him without the full security clearance others at his own company have to deal with spy satellites and other very restricted national security matters. Eric Lipton, investigative reporter for the New York Times, joins Rachel Maddow to discuss.