Trump’s actions in Iran prove presidential war powers are out of control

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President Donald Trump’s decision to kill Iranian general Qassem Soleimani without informing Congress raises troubling questions about the state of our democracy, explains Yale Law School professor and former special counsel to the Department of Defense Oona Hathaway. Hathaway joins NBC News THINK to explain how Congress has allowed its oversight of this vital responsibility to atrophy, as president after president push the envelope further.