Newly released Mueller memos detail early Trump campaign efforts to push Ukraine conspiracy theory at center of impeachment inquiry

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Memos of witness interviews from the Mueller investigation offer new details about the Ukraine conspiracy theory at the heart of the impeachment inquiry. BuzzFeed's Jason Leopold explains what we're learning about Trump campaign officials' work to pin 2016 DNC hack on Ukraine instead of Russia, and how the Trump campaign relied on leaks to pump up poll numbers.