P.M. Edition for May 9. In a social-media post, President Trump said lowering tariffs on Chinese goods to 80% “seems right.” Meanwhile, Beijing moved to enforce restrictions on exports of rare-earth metals before this weekend’s talks in Switzerland. But when it comes to the future of electric motors, that might not matter; WSJ tech columnist Christopher Mims tells us about one startup that’s using iron and steel instead. Plus, Newark Liberty International Airport suffers its second tech outage in two weeks. Victoria Craig hosts.

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