Very hard to use tariffs both as a negotiating tool and a way to increase revenue: Miriam Sapiro

President Trump says he's going to impose a 100% tariff on semiconductors, but will make exceptions for businesses that invest uh in the US. Joining us now, Miriam Shapiro. She served as both acting and deputy US trade representative in the Obama administration.She's now a non-resident senior adviser with bipartisan national security think tank CSIS. Uh earlier, and it's good to have you, Miriam. Thanks.Earlier I we just noted wow uh more tariffs market up 250 and a lot of people were saying market's not up ...