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Tax fight: Raising rates vs. ‘reform’

Billionaire Warren Buffett wrote a New York Times op-ed calling for a minimum 30% federal tax rate on incomes over $1 million and a 35% tax rate on incomes over $10 million, while the White House issued a challenge to Republicans who say they want tax reform. MSNBC's Lawrence O'Donnell discusses with The Washington Post's Ezra Klein.