Chuck Smith monitors the manufacturing process of the series 6 solar panels during a tour of a First Solar plant in Walbridge, Ohio, on Oct. 6, 2021.First Solar shares plunged on Wednesday, after CEO Mark Widmar said the scale and depth of President Donald Trump's tariffs were unexpected and pose a "significant economic headwind" to the company's manufacturing facilities.Widmar said the implementation of new trade policies by Trump was viewed by First Solar as a possibility, but the tariffs imposed by the p ...