MSNBC’s Ari Melber reports on Elon Musk’s exit from The White House and the damage caused by President Trump’s tariffs, which have already cost companies more than $34 billion dollars, per Reuters. (Subscribe to Ari’s YouTube now: http://youtube.com/arimelber) For more context and news coverage of the most important stories of our day click here: https://www.msnbc.com/…