look at milton friedman's works on tariffs and they pretty much confirmed that but he used it as you said in a reciprocal fashion. he wasn't willy-nilly throwing tariffs on everything. of chinaation stayed the same his add tire administration. >> tariffs create trade wars like price wars and i lived through all of those, not a good thing but if you use it in practice, not policy like he did, he got us to the table. the tariff on evs sounds great but the consumer, the us consumer put their own tariffs on evs out of china, they are not buying them. i'm not sure the real impact on increased prices will have a basis. if you look at vw they were displaced in china, they are pulling back and if you look what happened in the us, jeff farley had to write $6 billion off, 2,500, the evs will happen but it has to be an evolution versus revolution. the other administration talks about all the ev on the road, there's 290 million fossil fuel cars on the road today. someone asked the second question, what happens when you talk about all evs how to get rid of 290 million cars? the average age is 12.6 years. david: of course the mackenzie study showing ev drivers are likely to buy a gas car