The President Who Cried Wolf? Trump kicking tariff deadline down the road again

Today was meant to be the president's big deadline for countries to reach trade deals with the US. But since he punted that date to next month, instead this morning, we have promises of more tariffs on the way. Now he's threatening 50% tariffs on copper imports and up to 200% on pharmaceuticals imported into the US.The president also posting on social media that more trade letters could go out to countries today after he sent 14 of them on Monday. NBC News business and data correspondent Brian Chung is here ...