President Trump will unveil sweeping tariffs at a Rose Garden event at 4pm today after the markets close. NBC News senior business correspondent Christine Romans, New York Times chief White House correspondent Peter Baker, Punchbowl News co-founder Jake Sherman and Moody's Analytics chief economist Mark Zandi join Katy Tur to break it all down. For more context and news coverage of the most important stories of our day click here: https://www.msnbc.com/ » Subscribe to MSNBC: https://www.youtube.