Sen. Tim Kaine reacts to White House weighing military plans to counter Iran

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Tensions are running high today, after the State Department ordered non-emergency U.S. government employees in Iraq to leave the embassy in Baghdad and consulate in Erbil. Is this bluster? Or is the U.S. ratcheting towards war? Democratic Senator Tim Kaine, who serves on the Foreign Relations and Armed Services Committees, joins Andrea Mitchell to discuss.