How Trump's Ukraine conspiracy backfired in the impeachment probe

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Newly-released documents from the Mueller probe reveal Paul Manafort began pushing the debunked Ukraine conspiracy theory at the heart of Trump’s bribery plot as far back as 2016. Buzzfeed reporter Anthony Cormier joins Ari Melber to discuss how Trump and his allies tried to weaponize the debunked conspiracy and how it’s backfired on them.